When a girl jacks you off and gives you a blow job at the same time.
Guy1: Dude what'd you and your Girl do last night?
Guy2: Man, she gave me a blow-handy.
Guy1: what's that?
Guy2: imagine an Amish girl churning butter only she's sucking the handle like a dick.
Guy1: nice!
A blowjob that is mostly just a handjob.
My new girl went down on me but only gave me an 80/20 handy-blow. My old girl was all throat but this chick wouldn't put more than the first couple inches of my dick in her mouth.