Me being me, i'm into the old psychological warfare, so anything us Axis players can do to wind the Allied players up is a bonus 
Anyway, some suggestions!
1: Group singing of the Panzerlied as we march out of the Safezone en masse. Trust me. My singing has been classified as a "cruel and unusual punishment" under the ECHR, so that'll torture them a bit!
2: W-SS kit wearers are to look at the others and pity them because "their uniforms weren't designed by Hugo Boss"
3: Overload on Scho-Ka-Kola to get the Caffeine and Sugar levels up to promote a good "two thousand yard" stare
4: Remind the British players that they only won because the Americans joined in the punch up.
5: Remind the American players that they were a bunch of laggards that turned up 2/3rd's of the way through it, so stop looking so smug
Comedy suggestions only please!
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
Nixen shooten auf dem zafteyzonen , und nein whiningwhinging auf dem hitzingtaking .
Nein bangenbangen unter dem Kaparken, unt argumenting mit dem Feldmarshall is verbotten .
Who needs to speak german ! 
Dodgy German accents all day then
I'll buy a pint for the first Axis player that can get a Brit player to surrender with the immortal words "For you Tommy, Ze Var is over!" 
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
Joking aside we're thinking about having a select list of german words to shout at the enemy/each other ? Any thoughts within reason .
Obvious ones:
Charge!
Enemy sniper!
Sh*t, my battery has just died!
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
Meine Hoppen ist kaput !
Ver ist der thunderflashen ?
Here are a few phrases you might find useful.
Sniper = Scharfschütze
Enemy Spotted = Feind beschmutzte
Enemy Down = Feind unten
Attack Right Flank = Rechte flanke angreifen
Attack Left Flank = Linke flanke angreifen
Follow Me = Mit Kommen
Fall Back = Zuruck fallen (you might be using this one a lot!)
Please note I do not, even pretend, to be able to speak German.
These come courtesy of Call of Duty (the game) and http://world.altavista.com/tr for spelling.
Here are a few phrases you might find useful.
Fall Back = Zuruck fallen (you might be using this one a lot!)
That sounds like a challenge to me!
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
You could all try shouting................ KAMERAD.....KAMERAD.
and putting your hands in the air.
evil kraut chewing bosche.....................
=P
"Take that you rotton helping of strawberry flan!"
Joseph Porta to "strawberrys and cream", in the sven hassel book ,ogpu prison
Hmmmm, someone has just put a price on his head....
And that price shall be claimed. With my MG42...MWAHAHA
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
Wo ist der Rathaus bitte ?
Der Rathaus ist zweiten linke rechts.
(or something..)
How about...
Du esse vorhuat! (lowering the tone slightly...)
Xx
I hope all you Germans are prepared to act in a soldierly fashion rather than in the usual sadass airsofters manner .
It might be nice to be able to form up as a squad and march away from the meeting point to the sound of "links.... recht" rather than drift around like a bunch of kids/yanks........ 
We may be outnumbered , but we can show the Amis how a proper army goes auf Kreig !
Food for thought ...
Gotta say I agree. Show those slouching yanks how things are done. Improper dress will get you a visit from the Feldgendarmerie lol
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
Inappropriate preening and strutting will lose you the war!!
As in all areas of life, it's what's under the clothes that really matters!
Stick to your sloppy area GI joe
Ah , the click of jackboots in salute !
Ah, the sound of hundreds of thousands of well-dressed capitulating Nazis marching West on the beautifully autobahns we now use to drive into your lovely Fatherland.
*Scuttles off to 'Allied Zone' before someone lobs a stick grenade.* 
*pulls the cord on a stick grenade, throws grenade. Grenade is a dud, but the throw is still good - and it catches Headshot right in the nuts*
Just remember that in man to man fighting (where Artillery and Aircraft weren't involved) that the Germans won the vast majority of actions...
And I dont see any Typhoons or Thunderbolts, nor pack howitzers in Derbyshire
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........
Didnt you know? its one of the Germans secret weapons. A nutsack seeking grenade. After all, the germans were far ahead in such things. The first operational use of NV gear, the first military use of a helicopter (yup, i didnt believe either until i researched 'em!) the first ballistic missile...
Such things are not difficult for the Fatherland lol
When we were a Kingdom it was run by a King
When we were an Empire it was run by an Empress
Now we're a country we're run by a..........