the state a guy gets when sexually aroused; penis fills with blood and stands straight up and often makes a bulge through pants; boxers, etc. especially embarrasing for teenage boys who are turned on frequently and can't seem to control their boners
by Drexelsage January 2, 2004
Get the stiffiemug. by Urban gang November 29, 2017
Get the Stiffymug. by xxdecayingashes December 26, 2004
Get the stiffymug. A slang word for erection or hard-on. As an erection is the 'stiffing' of the penis, a 'stiffy' is an understandable slang word. Normally used by children first discovering sexual things.
by Athena12 March 26, 2009
Get the Stiffymug. by g0t4 May 19, 2011
Get the Stiffiesmug. by Dude_75 April 17, 2006
Get the stiffymug.