To have sex with a woman during her menstrual cycle, hence the name. M (enstrual) C (ycle) Hammer (well, duh, i hope i don't need to explain this one)
by m00 November 15, 2004
Get the MC Hammermug. A person with a penis. Commonly used to refer to a woman who turns out to be a man. Also could refer to having a large penis.
by live nude girls March 18, 2010
Get the swinging hammermug. 
the act of one man penetrating another man, missionary style, while holding tightly to the receiving man's erect penis, attempting to "lift the hammer"
Nothing better than working up a good sweat in Gold's Gym, showering off and then Thor's Hammering your spotter...
by Bennjammin July 27, 2018
Get the Thor's Hammermug. term used to describe the penis when an individual engages in anal sex to influence the outcome of a situation.
by Bushguy July 29, 2009
Get the pooh hammermug. When an industrial facility that consumes a copious volume of water suddenly stops drawing water from a water treatment plant via a pneumatic switch or quick-close valve. The instantaneous closing of the valve causes a backup of water pressure that breaks water treatment plant pumps and pipes.
The water treatment plant's pumps were destroyed when a chicken plant slammed their valve closed after a washdown of the facility causing a water hammer
by Un-Civil Engineer December 23, 2011
Get the water hammermug. The act of stomping on ones body repeatedly in a fight, using the heel of one foot as a weapon of mass destruction.
by teeskees July 29, 2012
Get the Hammer heelmug.