Top Definition
Synonymous with fun on a bun , It's essentially a better way of saying something will totally kick ass. Used to describe occasions in which your run-of-the-mill phrases describing how much fun something is gonna be just can't aptly describe the amount funs that will be in your buns.
Can also be abbreviated FIMB.
This party is gonna be Funs In My Buns, hope I don't get the runs
by Teddybob Muchacho December 15, 2010

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