I wonder if it's got anything to do with the Latin,
"Quid pro quo"? Maybe that's where the slang quid was taken from.

Dinosaur.

"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland

"Don't let the bastards get you down". Kris Kristofferson

"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville