2 definitions by TheRealButcher

Unexpected Bowel Movements. Very common in Asian countries.
- F: I have my 10 hours long trip to come back to the States. Let's eat a last very spicy pad Thai!

- Q: Aren't you afraid of a UBM during the flight?

- F: Worth it man.

(3 hours later, in the aircraft, with tiny, always closed and/or uncomfortable toilet)

- F: Damn, you were right!!
by TheRealButcher August 7, 2016
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To be hit very hard in the face with a phallus. This action leads to a knockout and most of the time a memory loss.
- L: How was your night yesterday with QP ?
- U: Well, I'm not sure.. I can't really remember.
- L: He probably did a "dick knockout" !
by TheRealButcher June 26, 2015
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