who'da thunk 

A sarcastic expression that explains that everybody/somebody has already thought of that or has acquired that information already

"Lemons sting!"..."Well who'da thunk"

who'da thunk by forever.and.fucking.always March 17, 2015

Who da thunk it

Short-cutting "Who would have thought it" or "I cant believe it"

Person 1: "I got tickets to the concert"
Person 2: "Who da thunk it! You da man!"

Who da thunk it by Fåtß0¥ July 7, 2005

whodathunkitwhatsis 

A nonsense substitute word used when you don't know the proper term for something or simply can't remember it. Derived from "Who'd have thunk it" and "what's this?".

My car broke down and Dad has to repair the whodathunkitwhatsis to get it running again.

whodathunkitwhatsis by Emby Quinn October 22, 2003

whodathunkit 

Shortened version of 'Who would have thought it to be so?'

James: 4 o'clock, Dave. Tea time!
Dave: Whodathunkit!

whodathunkit by Pequod April 16, 2005

whodathunk 

Short form for "Who would've thought?"

Kay: MJ is innocent!
Jay: Whodathunk?!

whodathunk by KidProQuo November 7, 2005