- 1wallop somebody/something to hit someone or something very hard synonym thump My father used to wallop me if I told lies.
- 2wallop somebody/something to defeat someone completely in a contest, match, etc. We walloped them 6–0.
NAmE//ˈwɑləp//(informal)Verb Forms present simple I / you / we / they wallop
he / she / it wallops
past simple walloped
-ing form walloping