shouldness

A measurement of whether something should happen, or should have happened.

"Rank your hookup candidates in order from high to low shouldness."

"'Gigli' may be the worst movie of all time. It is completely devoid of shouldness."

should of

Wrong writing and saying of 'should have'
Many people mishear 'should've' and hear 'should of' instead. Same procedure with 'must've' and 'could've'

I should of learnt some better English.

should of

A stupid way of saying "should have".

Person: I totally should of bought the bike, duuuuude.
Me: DIEEEEEEEEEEEEEEEEEEEEE! *stabs to death*

should of

What idiots say instead of should have. It makes most people want to stab the offender to death.

"I should have not said "should of", becuase after I did I got a screwdriver to the face."

Should

A word used to describe something that could happen but likely will never due to a standard lack of caring, ethics, or general sense.

Person 1: "William should unplug that garbage disposal before he sticks his hand in there".

Person 2: "20 bucks says he wont".

should of

Ignorant way of saying, texting, or posting on facebook the contraction of should have (should've). Especially pathetic when supposedly educated people use the phrase.

I should of paid attention in high school English class so my participles wouldn't be dangling.

should of

Misspelling of should've (should have)

He should of gotten a Dreamcast