chum up

UK old-fashioned informal — phrasal verb with chum

/tʃʌm/ verb (-mm-)

Definition

› to become friends: She chummed up with some girls from Bristol on holiday.Being, becoming friends and getting to know someone

(Definition of chum up from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

to not be trusted or popular because people think you have done something bad

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