Meaning of “goop” in the English Dictionary

british dictionary

"goop" in British English

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goopnoun [ U ]

uk /ɡuːp/ us /ɡuːp/ informal

(Definition of “goop” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"goop" in American English

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goopnoun [ U ]

us /ɡup/ infml

a messy, slightly liquid substance, esp. one whose contents are not known:

He puts this goop on his hair to make it stand up straight.

(Definition of “goop” from the Cambridge Academic Content Dictionary © Cambridge University Press)