whack

1. The sound of a heavy strike. (countable, uncountable)
2. The strike itself. (countable, uncountable)
3. The stroke itself, regardless of its successful impact. (countable, uncountable)
4. An attempt, a chance, a turn, a go, originally an attempt to beat someone or something. (countable, slang, uncountable) · C'mon. Take a whack at it.· 40 bucks a whack.
5. A share, a portion, especially a full share or large portion. (countable, dated, uncountable)
6. A harmful outcome or repercussion. (countable, slang, uncountable)
7. PCP, phencyclidine (also wack). (dated, uncountable)
8. The backslash, ⟨ \ ⟩. (countable, slang, uncountable) · del c:\docs\readme.txt Delete c colon whack docs whack readme dot text.

Plural whacks