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The act of continuing sexual intercourse when the female does not particularly desire to continue. Always begins as consensual, however usually evolves into non consensual sex, and is normally characterized by forceful and rough insertion by the male. Can be a result of a couple different things: the male taking an obscenely long time to ejaculate, or too rough of intercourse for the female and is usually considered as a little rapey or borderline rape. For some men, accomplishing this is a point of pride amongst their peers.
Girl 1: "So how was your night the other night?"

Girl 2: "It was going great until he started jamtapping me."

Girl 1: "Are you sore?"
by Jamtapper March 05, 2014
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