I've been running a module on slang at the University of Leicester since 2004, and between them the students on this module have collected just over 3000 different slang terms. Lots of them use various kinds of abbreviation, and here are some of the ones that have been listed more than once:
Clippings
amaze "amazing"
bday "birthday"
bro "brother; friend"
def "definitely"
diss "dissertation"
diss "to disrespect"
flid "an idiot"
ledge "a person deserving respect; excellent"
obv "obviously"
perv "a pervert; to behave pervertedly"
ridic "ridiculous"
scrote "testicles; an despicable person"
uni "university"
vadge "vagina"
vom "to vomit"
Front clippings
nads "testicles"
rents "parents"
tard "an idiot"
Clippings with -ie/-y
bevvy "a drink; to drink"
dissy "dissertation"
eppie "a temper tantrum"
sarky "sarcastic"
selfie "a self-taken photo posted online"
Clippings with -o
aggro "trouble, bother, violence"
deffo "definitely"
disso "dissertation"
pen(n)o "a penalty kick"
Clippings with -s/-z (these are usually adverbial)
appaz "apparently"
blates "blatantly"
mebs "maybe"
totes "totally"
Initialisms
bj "a blowjob"
bs "nonsense; lies"
fml "fuck my life"
fyi "for your information"
idk "I don't know"
lmao "laugh(ing) my arse/ass off"
oj "orange juice"
pov "point of view"
tbh "to be honest"
v "virgin"
wtf "what the fuck"
Acronyms
doovd "dvd"
lols "laugh(ing) out loud"
milf "an attractive older woman"
yolo "you only live once"
