Top Definition
an essay you wrote while talking to your best friend on facebook.
"Hey why'd it take you five minutes to reply to my message?"

"I was perfecting my mastercrap."
by star&sky May 05, 2009
1 more definition
The subtle art of masturbation whilst enjoying a number 2. This mythical act is thought to be impossible as getting wood at the same time as taking a dump is weird.

It is perhaps only possibly by those who are aroused by such porn as 2 girls 1 cup.
Oh damn Tom Cruise this combination of viagra and laxatives is taking it's toll on me.

Well David Beckham you should probably go and try for a mastercrap. Might as well like.

Hells yeah. Peace be to xenu.
by Baron Von Longendong October 04, 2008

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