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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An Unexpected Beautiful Moment.

The answer for those that truly seek and look beyond the surface. The product of revealing the unexpected beauty in life – making one's richer.

A #UBM is an invitation to truly see and experience. It's when you meet someone and this person becomes special, it's when you have an experience for the first time and end up enjoying it... the passport to every day discoveries.
I went to the bar around the corner, met an interesting girl/guy (or both), came back to my place, and had a UBM.

I went to Coachella and heard this band called St. Lucia for the first time. It was such a UBM!

Well, I saw this Issey Miyake jacket in Tokyo, it was a true UBM. I knew I needed to bring it back with me.

I went to Cuba with very low expectations; however, I had a UBM. The party was sick, the food was great, and my Italian lover hot.
by brooklynite in manhattan November 2, 2018
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Slang in the southeast. Ubm = of them.
Me: Dang man, ain't you worried about mooshing them chickens under your tractor, there?

Farmer: Take a look around this place! It ain't zackly like theys a shortage ubm!
by enemy-a October 15, 2010
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