Top Definition
The rate by which a woman's breasts move while she is on top of a man during sex.
Dude 1: Last night she got on top and rode me like I was a mechanical bull.
Dude 2: What was her boobalocity?
Dude 1: At least 45 nipple rotations per minute (NR/min)
by Roberta Jenkins II May 18, 2009

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