half mastin 

The act of having sex without a full erection. Usually occurs when one is conciously grossed out by the person he is having sex with, but engaging her in sexual intercourse anyway just for the sake of busting a nut or due to sheer boredom. Almost always is sensationaless and unsatisfying, and prevalence almost always increases when drugs and alchohol are involved.

"Yo you fuck that bitch last night"?
"Yea, it was awful though, she was so doggish I was half mastin but I went through with it anyway cuz I'm a trooper."

half mastin by c slappa March 29, 2010

gash mashing 

To have rought vaginal sex with a female , usually after injesting many alcoholic beverages.

After a few cocktails, I did some gash mashing on the GF.

gash mashing by Bucky-boy Tiger-Lilly August 29, 2009

mashing taters

When a man cums inside a woman and punches the woman's vagina until it becomes numb. When she is on her period, the blood can add a nice cranberry flavor/ look. Heating up the semen in a plastic bag can give the girl a nice sensation and act as the gravy.

Tyler was mashing taters so hard Averie couldn't walk for weeks

mashing taters by ten_leprechauns April 7, 2017

Nasty Mastin 

When you pour a liquid into someones vagina and put her legs over your shoulders and drink it out.

I gave Jody Terry a Nasty Mastin last night.

Nasty Mastin by Scott Junk October 26, 2010

Maslin Law

An epiphany of cognition that supersedes all reason. It is akin to thisness and whatness; is the law actually a law, or just the thought of what a law is? You will only know if it has happened, after it has happened. It requires no translation; no correlations; no other relevancy. It just is.

Anything that only makes sense to the person doing it is Maslin Law. For instance, a person who insists on playing a drinking game by a rule or rules which no one has ever heard of, Maslin Law. You can only witness examples of Maslin Law after it has happened.

Maslin Law by Amicus July 21, 2009

Mashing Cakes

To mash cakes means bumping uglies, swaping gravy, or doing the no pants dance. Can be used in past tense and appreviated ex."we mashed"

If you bring home a drunk college girl from a keg party, your probably gonna end up mashing cakes.

Mashing Cakes by clay motha fukin jones March 5, 2008

minge mashing

When two women press their vaginas together with significant force, and then "mash" them together as if they were trying to mash potatoes.

There were these two massive lesbians at the party who took their clothes off and started minge mashing all over the place. It looked like they were trying to make enough potatoes for a Christmas lunch!

minge mashing by wj+akg December 27, 2010