Entry 3 senses · 2 variants Webster, 1913 bushwhack · bush·whack · IPA /bˈʊʃwˌæk/ v. t. v. i. 01 v. t. to lie in ambush for, lie in wait for. 1. to lie in ambush for, lie in wait for. Syn. ambush, scupper, lie for, waylay, lurk, ambuscade. 02 v. i. to live in the bush as a fugitive or as a guerilla. 1. to live in the bush as a fugitive or as a guerilla. 2. to cut one's way through the woods or bush.