The belief, commonly held by baseball players, that by sleeping with an overweight and unattractive women they can break their slump.
A slump being the period of time when a player is not playing their best or is under preforming.
"Dude before today you weren't able to hit yourself out of a paper bag. Whats the deal?"

"Dude I know! Last night I found myself a slumpbuster."
by Supe22 February 16, 2009
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When you don't get laid for awhile, your in a slump. So you screw a girl that you would not be seen in public with unless you were intoxicated.
Yo Banksta!!! that girl last night was a SlumpBuster!!! I bet she was happy this morning when she seen you!!! LOL
by Ryan Ren a.k.a. Lil 'RR' August 29, 2008
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Any person that ends another person's long spell of sexual inactivity.
*does not apply to virgins
Guy at Party: "Hey man, are you two together"
Guy previously in Slump: "No way dude, she's merely a slumpbuster."

by Jack McFadden September 1, 2006
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That team in your Fantasy Football League you know everybody lays the Hammer to.
I am going to hammer those drunk guys in our Fantasy Football League. They are a slumpbuster.
by Ziggy's Pack October 7, 2010
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a female or male companion that you have intercourse with after a long period of time, not getting laid, and have no intention of contacting again.
I banged the front desk girl at the hotel last night and she was a total Slumpbuster.

I need to find me a slumpbuster tonight.
by JonVan January 10, 2015
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