the job which a frigid fat or obese girl would give to her boyfriend.
an explanation is that the boyfriend would lube up her stomach and then push her 'rolls' over his penis then 'go to town with it'
boyfriend; Oh My god im so horny, please have sex with me.
Girlfriend ; No,
Bf; Give me a blowjob then.
gf; ill give you a roll-rub, if you have some lube.
bf ; ill spit on it.