Used when ordering coffee and you want half regular and half decaffinated.
I'll have a tall half-caf latte on the fly.
a nick name for someone,when rating them...they are a 5 out of 10
dude: "omg dude that chick jackie is such a half caf!"
other dude: "ya i know right, she doesnt even know what it means thats why its so funny"
When its hot and sweaty and your scrote gets stuck to your thigh, but just one side. Beeeyotch!
Damn this heat, I got a half-caf batwing goin'