mixing one's marbles: someone confusing people/things, unintential.
As opposed to losing marbles which can mean loosing grip of a situation or things, usually uttered in a frustrated manner, "I am losing my marbles".
You are mixing your marbles, you should have sent the package to me, not to Keith.
There is no mixing marbles.
Marble arch - A naked girl standing with her legs spread.
I fucked her marble arch in the alley.
When a female agrees to tuck a males scrotum into her anus, fart, and toss the scrotum like a pair of marbles through the air .
Man, Brenda sure does know how to give a great Chillicothe Marble Toss . I'm still feeling it today !
A close reference to "Waterhead" or "Smoothbrain". A "Marble Brain" is typically a just a stupid person with cognitive skills of elementary school kid. Every thought or response is simple & incoherent. Furthermore, it is believed a "Marble Brain" loses a single marble trying to repsond until all their marbles are gone. This is followed by rambling & annoying trailing sentences.
Wow, the retard with a hockey helmet and a bail bonds shirt looks like a Marble Brain.
When your right testicle gets lodged between your butthole.
Pollock was playing games. Then all of a sudden, he was called down to the kitchen to assist his mother. Pollock got up way too fast causing him to have a Marble buttplug, when your right testicle gets lodged between your butthole. Ouch!
What the wash cloth looks like after anal. The smeared colors from semen, poop, and blood.
Bobby gave me a marble slab the othernight.
When you sit down in and accidentally sit on your balls and roll them as you are sliding into the seat.
Awe shit I just marble rolled when I sat down!