English Dictionary

chum up

verb

(idiomatic, informal) To be friendly toward (with or to) someone, especially in an ingratiating way; to form a friendship (with).

I decided to chum up with my new coworker.

意味（1）

(idiomatic, informal) To be friendly toward (with or to) someone, especially in an ingratiating way; to form a friendship (with).

I chummed up with a few of my new work colleagues.

意味（2）

(obsolete, UK, prison slang, transitive) To initiate (a new prisoner) through a ritual involving beating him with sticks and swords, accompanied by music, to extort money from him.

They have a practice of “chumming up” a new fellow-prisoner—beating him with old swords and staves kept in the prison for the purpose, to exact a fee of a half-crown.