Learning languages, aren't we???
First, of utmost importance, if you wanna learn German that is, you gotta learn
How to order a beer/whiskey/vodka/..., then go on with the insults
Ein Bier bitte! (means: One beer, please! subsitute "Bier" as needed with "Vodka" or "Whiskey" or any other alcoholic drink)
Noch n Bier! - You use this to repeat the positive effect of the firt expression
Biieer! Meehhrr Bieeer! - Try looking somehow drunken (Note: If you wanna appear like you can stand much alcohol, then don't use this phrase unless the 7th beer!!!
Einnnnaaa jeehtt noch, einaa jet noch reeeeeiin... or just singing the lyrics for
Onkel Tom - Es gibt kein Bier auf Hawaii (Any other German drinking song is adequate!) - This phrase comes in handy at the end of your adventure through a German bar... repeat and modify as necessary (with phrases you catch up from other drunken fellows at the bar) until fading out!
So long, Cheerz!!
(You are now most likely fit to survival in Germany! 90% of it's population would recognize you as a German!!)