1 definition by Rob Williams13

Top Definition
A sexual encounter in which one individual is clearly "taking one for the team" to elevate his friends chance of getting laid. Or A sexual encounter derived purely from sympathy.
Jodi is a 40 year old woman who has 3 kids and works all the time she needs a mercy jump.

I know she's a little chubby, but can you give my girlfriend's sister a mercy jump.
by Rob Williams13 January 03, 2008

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