A stupid way of saying "would have" or "would've". In essence, it's bad grammar & no one seems to care.

when you're hungover as shit after a spending a night drunk as a skunk

A construction used by people who may be native English speakers, but who still don't understand that "of" and "have" are different words.

When an educated English Speaker intends to say "Would HAVE", they instead contract the written form to would've. Less intellectual people (read: Dumbasses) then read this and, unable to grasp the concept of abbreviation, pronounce it as "Would've". This, due to laziness, was then mutated to "Would of," whereupon Bahamut was returned to mortal flesh and mankind entered a new age of darkness, suffering and general illiteracy.

Short form of would've and would have. (Uses less pixels). Usually used to annoy pedants.

Replacement for the proper words "would have" or abbrevited would've.

Another form of "would have". Implies a more casual setting. Acceptable and common in everyday speaking and writing, but perhaps you should write "would have" on your next English essay. Pet peeve of grammar dweebs and English teachers.