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1.
The act of a female's lips vibrating on the shaft of a penis. similar to motorboating for a man
Last night she offered to motorbone me
by phaceyj September 21, 2010
 
2.
when a girl is giving head you grab her hair/ears and thrust faster and harder.
This chick was giving me head and I grabbed her hair and motor boned her, when she gagged it was sweet!!
by motor bone expert January 11, 2009