Man, I am not too sure about what nicknames we talking here, but let me present a couple of 'em for people like the Anti-Citizens from HL2RP:
"Fenrir"
"Pope"
"Shifty"
"Diva"
"Buddha"
"Dankest"
"ChopChop"
"Dreamer"
"Hound"
"Rogue"
"Monday"
"Greasy"
"Locust"
"Typhoon"
"Steady"
"Redneck"
"Puppy"
"Solitude"
"Nero"
"King Ape"
"Donald"
"Fighter"
"Melancholy"
"Dusty"
"Stoner"
"Boldness"
"Le Douche"
Can't be arsed for more at the moment.
Listen...I hope we get some nice nicknames going. Just recently my character in HL2RP (name John Riley) arrived at the doorstep of Denaros bar or what it's called. Two guys were guarding and asking people for a nickname before they may enter. I was busy RPing my nervousity when one guy went ahead and gave me a legendary nickname.
Legendary nickname
Legend...dary Nick...
Legendary...
Legend...
Nickname....
~~~~~~~~~~~~~~~~~~~ "Jeff" ~~~~~~~~~~~~~~~~~~~
%&$#?@!
Dat motherf****r