1. (n) a mispronounced word, often given a different meaning than the normal pronounciation
2. (n) the act of mispronouncing a word in the asumption that the word means something other than its normal meaning
3. (v) to perform (2) or create (1) a punish; -ed, -ing
"Why do you have punish (poon-ish) writen on your hand? What does it mean?" "It's not punish (poon-ish), it's punish (pun-ish)."