A person who is tiny or has a tiny body, but has a big head and/or fluffy,spikey or crazy hairdo. They resemble a muffin, because muffins have a tiny bottom part with a huge fluffy top part, just with alot more stuff on them than a muffin. may be used as a degrading term for a short or tiny person.
person A: LOL THAT PERSONS HEAD IS DISPROPORTIONAL TO HIS BODY! WHAT A MUFFINSTUFF
person B: HAHAH YEAH! HIS HEAD IS TOO BIG AND HIS HAIR IS SO FLUFFY! LIKE A MUFFINSTUFF
person C: HEY YOU! CAN I CALL YOU MUFFINSTUFF??
person D: AWW, POOR LITTLE MUFFINSTUFF CANT REACH THE TOP SHELF?
Muffinstuffin is the act where a female sneaks her panties off and while thee unsuspecting male or female is talking away the muffinstuffer takes her opportunity to pounce upon her prey stuffing her vagina in her unsuspecting preys mouth thus stufffin her muffin.
Did you see that muffinstffin that Rachael did to myke.He clearly diddent see that muffinstuffin coming,she stuffed her muffin clean down his throat!
another term for a station wagon, mini-van, or any other kind of vehicle that is targeted at the "family" demographic(also M.A.V.)
"Tactical advantages aside, the M.A.V. is top of the line for the holy warrior troop transport manufactured by the Church of Latter Day Saints Military Industrial Complex. Also great for family trips...to heathen lands."
12 step recovery jargon referring to someone new who talks about how great life is, now that they'resober. Usually meaning that the person is out of touch with reality.
The new guy seems pretty happy for a dude who has no job, no money and no family. He must be on a pink cloud.