Used instead of profanities when expressing disappointment over a circumstance.
Bob yelled “fart muffin” after hearing he lost his job.
When a male or female takes a dump in a slightly larger persons belly button (a person that may have a muffin top)
Man: Yo Steve, I just gave Susie a fudge muffin last night!
Steve: dude, you're nasty!!!
Picking up after your dog while walking it and putting the poop bag in somebody’s mailbox.
Let’s give that jerk Schmedlapp a Mexican mailbox muffin.
Something a little greasy like a pastry, but sleazy like the IT guy peepin some cleavage while he uselessly double clicks your mouse.
Zak, get to fucking work you god-damned sleaze muffin.
A puff muffin is a vagina thats so fat it oozes juice constantly. People who like these types of vaginas typically have the name jakob.
Aye how'd you like that puff muffin last night bro?
The tip of the penis resembling a muffin.
You look hungry, Im gonna give you my throbbing muffin tip.
The female equivalent of road head.
Man, I'm glad she wore a skirt so I could give her a little road muffin on that long drive.