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(Noun) - A highly appealing abdominal region on a woman that causes an extremely strong desire in a man on which to ejaculate sperm.

It is not uncommon during intercourse that a man may achieve orgasm while in the missionary position. If he removes himself from the woman just prior to ejaculation, a frequent and convenient zone of fluid deposit is her abdominal area. A heightened level of satisfaction from performing this act can be attained by the woman having toned abdominal muscles, or at least having the appearance of such. Thus, the woman has a great stomach to cum on, or a "cumach".
Susie has been doing a lot of sit-ups. She has a total cumach now.
Cumach by Captain Inches January 29, 2010
Related Words
Anguish caused by the lack of cupcakes.
Freida suffered intense cupache when the bakery went out of business.
cupache by whyhello June 9, 2009

Cumcheese 

Cum that is not wiped away after weeks and goes stale.
Why is there cumcheese in my bed.
Cumcheese by yukman September 26, 2011
The epitome of ghosting, the best procrastinator in the world, and the one you look up to most when you are progressing in life. They stop that shit
Cumchee by Damn sexiness January 15, 2021

Cumchest 

When someone has boobs that you want to cum on. See also titfuck
My God, Sandra is a Cumchest.
Cumchest by melovescheese July 24, 2009

cumapheliac 

An extrordinary fetish for cum.
"Trish likes sperm so much she's a cumapheliac."
cumapheliac by Mike Keylon April 22, 2006