“Monkey Nuts” is a term used mostly in the Detroit, MI area and is slang for a dual drum magazine clip known as “C-Mag” (short for century magazine) that holds 100 rounds, most used on AR-15 and GLOCK models
“The AR got monkey nuts and a cotter on it”
Verb: The act of swinging on a sex swing wearing a gorilla suit.
Mary Ann was totally into the flying nut monkey last night.