TTBT

short for "Truth to be told"

"TTBT, I only know I know nothing"

atlst

short for "At least"

after going to feminist demonstration all day, she didn't propose sex. She atlst flashed her tits, though.

Rasengun

the ultimate Jutsu that Naruto would use to kill Sasuke if he weren't such an Usuratonkachi

Sasuke: Chidori!!
Naruto: RasenGUN!!!!
proceeds to shoot Sasuke and kill him.

utcp

Up To a Certain Point

Russ: are you one of her friends?
Ross: I guess, utcp

BoW

Both of Which

BoW influenced modern philosophical thinking in the nineteenth century