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2.
v., n.
When a female, during fellatio, takes the male's testicles into her mouth, allowing him to ejaculate in her hair.
Yeah, I gave that girl quite the grapefruiting.

She was grapefruiting me, and, well, I got flaccid.

She couldn't get it out of her hair for a week after that grapefruiting.
by Jesus June 18, 2004
 
1.
When a female uses a grape fruit to jack a male off while giving head. typically the male is blind folded and/or restrained.
MALE1: Dude my girl done some crazy shit last night
Male2: Like what?
Male1: She was grapefruiting me all night
by The great grapefruiter May 24, 2014