1 definition by Matt73

fullproof

Complete evidence or argument for the truth of a proposition. Not to be confused with "foolproof."

(on Facebook)
John: Your plan to create a seagull army is ridiculous...
Sarah: No it's not! It's fullproof!
John: It's foolproof... and that's fullproof evidence that it's not, bitch.

by Matt73 March 14, 2012