Like a hard on, it comes about when some thing is arousing, but not enough to induce a full erection.
While watching two average women make out, Jim noticed that he was sporting a half on.
by Harry T August 14, 2007
A service that is offered, and performed, by a prostitute. One half is oral sex, the other half is vaginal sex.
That was a cheap trick, he gave me fifty for a half and half.
by Chrono October 5, 2004
When a hooker spends half the time blowing you and half the time fucking you.

A half & half generally costs more than sex as the whore has to do more work and probably has to use two condoms, as she doesn't want what's in her mouth going into her pussy.
"So whatcha want honey: some head, sex, or half & half?"
by RomanGod June 20, 2007
getting head and vag sex for one price
that ho said: "10 bucks for head... 15 for half-in-half"
by Jankyboy June 24, 2005
A type of coffee so diluted by sugar, cream or milk that it no longer tastes like coffee, instead like milk and sugar, and has a beige or light brown color to it. The drink is typically concocted by those who want to appear as if they are drinking coffee but despise the taste.
Anne: Carrol is such a coffee poser, she'll only fill her mug with coffee halfway before she drowns it in milk and sugar.

Jill: Yeah, i hate the taste of her half and half and half.
by FrancisPerry August 21, 2010
In an Irish bar, a drink that's half Guinness and half lager. Not called a "black and tan" since those colors commemorate the british military force used to supress Irish uprisings.
In an English pub I'll order a black and tan, but in an Irish establishment, I'll order a half and half.
by slentinator May 27, 2005