The sexual act of grasping an erect penis and moving it about in a way that you would a car's gearstick, while at the same time, imitating the sound of the gears changing.
Mark was happily receiving a hearty blowjob from the girl from Perth but was caught off guard when she abruptly stopped and began to gearstick him. He noticed that she was particularly adept at imitating the sound of the gears shifting. Perhaps, he thought, she had a passion for car racing.
by dougla14 May 18, 2011
 Get the gearstickmug.
Get the gearstickmug. A person with a thin, long semi-box head, with the upper part being 2/3 wider than the lower half. It is imperative that the head is long but with a rounded top.
by CHuni November 4, 2013
 Get the gearstick headmug.
Get the gearstick headmug. Whilst driving down the moterway / freeway. Have your girlfriend give you a blowjob. When she is getting comfortable, accelerate into the back of a lorry.
Bonus points for every broken rib she obtains.
Bonus points for every broken rib she obtains.
by Fulou July 3, 2009
 Get the Angry Gearstickmug.
Get the Angry Gearstickmug. 'Xavier went to the D'parys on Friday night and gave his friend Edward a Rusty Gearstick behind the bar during his shift!'
by Dogsnansdog October 19, 2016
 Get the Rusty Gearstickmug.
Get the Rusty Gearstickmug.