Heh.  I can't say that these are any help to you guys. 

DOA - Death on arrival (Dead-on aim?)
UTPD - UT Pwnage division
SMD - Snipers of Mass Destruction
UOA  - Utter Ownage Association
FYI - Fuck You Idiot
DFB - Don't Fucking Blink
DIN - Death is near
DIG - DIgging Graves