a fully erect, hard penis and also a mens health clinic that treats erectile dysfunction with shockwaves
As soon as she touched him, boing, it sprang to full mast.
by TomBanana January 31, 2019
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A complete and full erection of the male penis

As opposed to a "Half Mast" or "Semi" when the male is slightly aroused or drunk, and unable to achieve "Full Mast"
"Yasmine baulked as Franks Full mast loomed into view"

"Now at full mast , Greg was emabarsed and could not stand up to get off at his desired bus sop"
by Ben L 64 November 7, 2006
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When you are half way on your way to a boner.
He was turned on half mast.
by artsyfartsygyrl April 18, 2006
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When the masts outnumber the port holes. See Sausage Party.
Oh man it's a total mast fest in here.
by xtonyx October 29, 2007
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when your pooping and realize your out of t.p. and have to waddle with your pants around your ankles or knees to go to the hallway closet to get more toilet paper.
my mom spotted me half masting and damn it was embarrasing
by vloky July 1, 2004
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Purposley masturbating so furiously to the point of such exhaustion that you vomit all over your own erect dick at the point of orgasm.
Dude, i totally walked in on jamie puking all over his own dick.

ahh, pulling a sailors mast i see, I'm impressed, i assumed he was impotent
by Dickjob McHawkins May 26, 2010
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