1. The act of falling flat on your ass with unprecedented amounts of clumsiness.
2. also can be when a girl tries to sit on your lap, but for whatever reason, clumsy or drunk...she puts too much of her weight into the landing and crushes your junk.
1. Kevin was trying to ride a Ripstick through walmart, and executed a perfect slam donk.
2. Gina slam donked my nuts last night at the party. it's not as fun as it sounds.
Prices shown in USD.
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