when you put gravel(large gravel, like 2B size gravel) into a girls butt and then proceed to have sex and cum in her butt. after cumming the girls swishes the gravel and semen mix and shits it out onto the floor where you are waiting with a trowel to mold it into whatever you so choose, preferably a yert.
"Wow, he sure gave her a great cement mixer last night! Just look at the size of the yert they made!"
by John Wayne Goatsie November 28, 2011
Grabbing a male's genitals and squeezing, twisting, and pulling them. Once someone has successfully completed a cement mixer, that person must yell the words 'CEMENT MIXER'.
by thefatek November 14, 2010
When a girl has all three holes filled by different guys and they all cum at the same time, they then proceed to yell break time and leave her to dry out.
by BackB0ne September 21, 2015
by m0rph3us October 14, 2004
A person who has a reputation for getting, or who has actually gotten, their ass kicked in almost every physical altercation they have ever been in, "cement merchant" being indicative of someone who gets knocked down to the ground a lot, and who loses more fights than he/she wins.
"I wouldn't pay that dude running his mouth at you like he's Mr. Tough Guy any mind...he's actually a real cement merchant and probably isn't worth your time."
by Kirk Bradford Myers November 19, 2006
When a man has alot of drugs, sometimes another man owes him an amount of money. The drug owner lays facedown on a cement slab, any sidewalk or neighbors driveway will do, and pulls his weiner and ball sac through his legs backwards, at this point the cement mixer becomes a gay bj all weird and shit out in some dudes front yard...yea its pretty fucked up
by Gotthebag March 11, 2009
You're out and about, the totty is first-class but you don't think you're going to pull so you whack out a quick one in the bogs. Later you *do* pull, but when she pulls your pants down she finds that your dick is welded to your gusset...thanks to "Gusset Cement".
by Nefeco April 24, 2005