Sentence:  "When one is looking for a <WSD>slumpbuster</WSD>, a hog, or “road beef” (as Canseco puts it), he seeks out, as Grace mentioned, the “fattest gnarliest chick you can uncover” in order to try to break out of a slump. 
Meaning of the word marked with <WSD> tags:  A person's first sexual partner after a slump (period without sex).