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
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
Also knowen as "the Weather Man" someone who is easily aroused in the presence of two or more guys or four second of porno. He smells like a sweaty jock strap because he doesn't know how to shower and never wears socks with running shoes. He is also knowen for breaking anything that can be broken. He is more ADD then a squirrel on red bull and loves to wallow in his own filth which is why you never ask him to clean because he will only make thing worse.
by Boodro September 1, 2010
When a persons pants are half pulled down, usually the result of drinking and falling asleep on the toilet.
by The real Steve T April 10, 2009
by Margu April 28, 2006
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