[norsky]

"....should of... One of the phrases that drives me nuts when I hear or see it. Along with “moving forward”, which means nothing in any context. Do we move backward? Unless you’re in a car, probably not."

Wut bout shoulda woulda coulda

[TangoLimaSierra]

Wut bout shoulda woulda coulda

At least those are obviously intentional. Would of, could of and should of are products of partial illiteracy.