Using your mobile phone while sitting on the toilet, long after you've finished going number one or two.
Man, he's been in the bathroom forever. He must be going number three.
by marcobenvoglio June 16, 2016
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When you have to piss and shit at the same time
Kid: Mommy, bathroom!

Mom: Number one or number two?

Kid: Number three! It's coming out!
by KnightofNerdom November 23, 2021
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Noun. Another term for semen. If Number One is urine and Number Two is feces, then Number Three must be semen.
Bob: Looks I just did a number three in my pants. Should have used a cumsock or jerked off it in the toilet.
by Kugeln May 6, 2020
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A street name for Heroin free-base (often looks like a light-brown powder), the often abused illegal narcotic. It can be smoked.

The number comes from the steps of purification until turning heroin into a salt (Number Four, that is).
Mostly used in Europe.
I mixed my Number Three with citric acid in order to turn it into a water-soluble salt for injecting.
by mudslime May 28, 2017
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