ts;du

too stupid, didn't understand

a perfect comeback for the infamous tl;dr line. Usually dropped by incompetent people who can not read paragraphs more then 3 sentences long. Coupled with an inability to understand words longer then 3 syllables.

has multiple uses to ensure the subject know they are truly stupid.

Boy: i was in a bar fight last night, totally kicked his ass. I could totally whip your boyfriends ass
Girl: you're pretty confident for someone who's vertically challenged
Boy: really? thanks I guess

Grl: ts;du

guy1: I wonder why she never laughs at our jokes?
guy2: ts:du