Meaning of “go down with sth” - Learner’s Dictionary

go down with sth

UK informal phrasal verb with go uk us /ɡəʊ/ verb [ I ] (present participle going, past tense went, past participle gone)

B2 to become sick, usually with an illness that is not very serious:

Our whole class went down with the flu.

(Definition of “go down with sth” from the Cambridge Learner’s Dictionary © Cambridge University Press)