When you have half of a boner. Kind of like a chub. You cannot control it. It is just there. Big and thick.
by My turbin is dirty February 17, 2012
by Busted Hyman July 05, 2006
where you had a throbber, and then has died down, but is still not gone flacid, and is still erect, but has just lost most of the inflation, giving the impression of a pencil dick, but you've just not got a full-on boner.
i was having a wank the other day, and then i heard a noise, but then when i went back, i was at half mast
by Shaun-e-e-e August 25, 2010
by Vocidy September 24, 2006
by Slightly_Mad March 02, 2004
by elvette July 20, 2006
Guy #1: hey do you see that girl?
Guy #2: The one in the booty shorts?
Guy #1 Yeah she's the reason I'm flying half mast.
Guy #2: The one in the booty shorts?
Guy #1 Yeah she's the reason I'm flying half mast.
by Alex_Pax November 23, 2016