Some Short Form English

Formal

w.r.t: with respect to

i.i.d: identical and independent distribution

WLOG: without loss of generality

WOP: well ordering principle

w.p.: with probability

a.s.: almost surely

r.v.: random variables

i.o.: infinitely often

a.e.: almost everywhere

Informal

lol: Laugh Out Loud

lmao: Laugh my ass out

fwb: friend with benifit