Top Definition
The act of a male delicately licking the vagina of a female while she is defecating, preferably log-type shit but explosive works as well.
"Dude I totally gave Tiffany a dump box the other night. It was awesome!"

"I love when he does a dump box on me."
by Tiff-Steph January 22, 2009
When a girl gets eaten out while sitting on the toilet taking a dump.
Tiffany totally got a dump box from Tom last night!
by Tgibby January 22, 2009
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