A term used to denote one's stupidity; mentally handicapped by the amount of pebbles and sediment in their cranium.
Guy 1: I've really gotten into THING I DISAGREE WITH.
Guy 2: LOOOOOOOOLLLL shut the fuck up, you stonebrain-ass bitch. How much sediment you got up there, huh? I can see pebbles coming out of your ears, bro.
Guy 2: LOOOOOOOOLLLL shut the fuck up, you stonebrain-ass bitch. How much sediment you got up there, huh? I can see pebbles coming out of your ears, bro.
by GimmickConnections February 14, 2021
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