Originated by Jim Eldridge.

The phrase means to suck beyond all comprehension and reason. To suck worse than even sucking a regular nut.

left nut of a heroic figure, a godly left testicle

literally, someone's left nut

a figure of small proportion; pathetic.

A derivative of "top left", top left nut is used in a hostile manner to tell someone to "get lost"; to fuck off.

Is a term to tell people to fuck off because who wants only one nut especially the left one

something that you say when you want to be provocative (especially if you are a chick) or use as a sarcastic comeback or reply. This expression is similar to kiss my ass and suck my balls