Euphemism for sexual intercourse; specifically with a female. Alternatively, when you buy a muffin for later and is destroyed due to being left in a soft sided container.
"Dude, I heard he totally crushed her muffin last summer... that's why they don't talk anymore."
"Awww, I crushed the muffin... I really wanted that..."
"Awww, I crushed the muffin... I really wanted that..."
by Ablearcher013 August 13, 2020
Friend 1: Hey buddy, what are you doing tonight?
Friend 2: Crushing the muffin.
Friend 1: AAaaaaaaawwwwwwwwwwwwww yeeeeeaaaaahh!
Friend 2: Crushing the muffin.
Friend 1: AAaaaaaaawwwwwwwwwwwwww yeeeeeaaaaahh!
by Johnny_Z3R0 March 15, 2011