LMFAOLU

laugh my fucking ass off loudly and uncontrollably
can also use:
lmfaol&u

ugly guy: hey hottie
pretty girl: hey
ugly guy: you are so hot, and beautiful, and cute, and blablabla
pretty girl: thanks
ugly guy: so cutie what do you think about me?
pretty girl: LMFAOLU xD!!!!
ugly guy: what?
pretty girl: bitch please...