1. When a man is in full control of his testicles, and uses them to compose himself like a man
2. To in any facet or manner act like a boss (usually involving one's approach to the opposite gender)
"Dude! Stop acting like a bitch and find your manposure"
"I was repeatedly punched in the gut today; I didn't flinch though. Some milfs were watching and i needed to maintain my manposure"
- Creds to Glowackattack on that quote
by Buschmann November 03, 2010

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