(verb) 1. the act of motorboating another's breasts while masturbating. 2. masturbating to the thought of motorboating another's breasts.
1) Look at Aimee motorbate that girl. 2) I'm going to motorbate to Jae's boobs last night.
by Hairy Peter October 11, 2012
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the act of vigorously shaking one's head between a pair of large breasts while simultaneously performing sexual acts on one's own genitalia
Motorbation is a large part of foreplay between Steve and his well-endowed wife.
by Paully Dizzle December 14, 2010
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The act of motorboating one's own breasts. See motorboat.
Homegirl's titties were so big she could TOTALLY perform self-motorbation!
by The Utco 4 May 11, 2011
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Somone who gets off without intercourse through the act of motorboating. This could be either person involved.
Dave's parents discovered he was a motorbator when they walked in on him and the stripper with implants just as they hit maximum RPM.
by DirtyOldWordsmith November 2, 2022
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