Top Definition
1. noun. a unit of time used to express a period greater than the more commonly used twolong.

2. adj. a unit of measurement of a male's inadequate sexual development.
1. Dude it's been threelong! I haven't seen you in forever!

2. Well, you probably shouldn't date Stefan, he's kind of a threelong...
by chazor November 15, 2007
5 Words related to threelong

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