The act of a girl (in the cowgirl position) lifting herself up until the penis is just about to fall out then sliding back down like a fireman on a pole.
by IronEyes January 8, 2018
Get the fireman slammug. by jch2617 December 27, 2019
Get the House Slammingmug. 
The act of repeatedly slamming into an escapee's flying motor vehicle or taxi, during a pursuit, in the attempt of disabling, or dismantling their flying apparatus. Additionally can be simply causing the temporary loss in their control of the vehicle.
I had a total slam competition with the fugitive in Mass Effect 2. She thought she'd get away with taking a shot at Tasoni but I dropped her vehicle out of the sky like clay pigeons at a shooting range.
by TheUrbanLad October 19, 2010
Get the slam competitionmug. 
A variation on a handjob, a slam junk is performed by jumping in the air with your arm outstretched, then slamming your hand, masturbation-style, onto the recipient's dick as if dunking a basketball. The more preferable variety of this position is performed with the recipient at a slightly higher elevation of 10 feet, although this is optional.
by ACID13X May 26, 2012
Get the slam junkmug. To shag
by megamegamegamega December 4, 2010
Get the Slam-dunkmug.