Getting really high. Derived from slice, meaning an eighth of an ounce of marijuana.
After work, Patrick and Nate got sliced up with that chick from Whole Foods.
by RamIDT September 20, 2013
Person 1: "haha you just got beat 10-0 at FIFA"

Person 2: "Slice up"
by PDastad February 25, 2011
A slice of pizza eaten while waiting for a full pie to be cooked.
Sal: I'm here to pick up two large pies and a small antipast

Vinny: Five more minutes

Sal: OK, give me a warm up slice while I wait.
by nyteacher February 2, 2011