Box Dump 

The act of defecating into another’s rectum.

The route of the phrase originates from prison slang as the act is often used as an initiation or power assertion within the pecking order of inmates.

I box dumped him and he now answers as my bitch.

Box Dump by Jonnieboy February 12, 2008

dump box 

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."

dump box by Tiff-Steph January 23, 2009

McDonald's Dump Box 

When you have a plethora of items in your pocket, and they all dump out over a period of time.

Me: hey you dropped more shit!
You: ah jeez, look at me being a McDonald's Dump Box again!

McDonald's Dump Box by Chaalsballs October 6, 2019

Dump box 

When a girl gets eaten out while sitting on the toilet taking a dump.

Tiffany totally got a dump box from Tom last night!

Dump box by Tgibby January 23, 2009

Dumped In her Box 

When having sexual intercourse with a woman and you come upon climax; instead of pulling out and shooting your wad in her face or guts, you shoot your load on the inside ie. "dumping in the box."

Cody: dude, i boned that blonde chick that works at the customer service desk.

Geoff: Did you pull out?

Cody: hell no bro i dumped in her box!!

Geoff: Fuckin sweet dude i'll take your sloppy seconds.

Dumped In her Box by Ovarian Headbutter December 23, 2008