COAD sun glasses a.k.a Centre of Attention Disorder sun glasses.
Glasses worn by people when they are trying to be inconspicuous, the glasses however make them the centre of attention, as the glasses usually worn are the big type that try to conceal something, usually a black eye.
BJ Cartlidge: Dude why are you wearing COAD sun glasses?
Quasim: Got punched man, black eye is a pain.
BJ Cartlidge: Fuck the glasses man, wear the black eye proud.
Quasim: Nah, I need COAD sun glasses.
Often used to express slight amusement at someone's attempt at humor which clearly wasn't worthy of a mere 'lol'.
Is becoming increasingly used in various internet cliques to satire the ridiculous and contrived nature of various acronyms used in Internet pop culture.
Guy 1: Hey man, check out this hilarious lolcats image macro!
Guy 2: coadtsai
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.