From Longman Dictionary of Contemporary Englishbump somebody ↔ off phrasal verb informalKILLto kill someone → bump→ See Verb table
Examples from the Corpus
bump off• But Reinhard Heydrich got to him, and bumped him off.• You are not even pointed out to him till just before he bumps you off.• Earlier yesterday I had felt like bumping him off personally.• Younger relay team members have squawked over Lewis possibly bumping them off the squad. 