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Phrase(s): blow (one’s) lunch [and] lose one’s lunch; blow one’s cookies; blow one’s groceries
Sl. to vomit. • I almost lost my lunch, I ran so hard. • I wanted to blow my lunch, that’s how rotten I felt. • He got carsick and blew his cookies all over the front seat.
McGrawhill's American Idioms And Phrasal Verbs