Definitions
1.verbTo hit, slap or strike.
2.verbTo kill, bump off.
3.verbTo share or parcel out; often with up."to whack the spoils of a robbery"
4.verbTo beat convincingly; to thrash.
5.verb(usually in the negative) To surpass; to better.
6.adjectiveTired; fatigued."After that all-night party, we were all whacked."
7.adjectiveIntoxicated on drugs.