Blow-chunks Definition

verb

(idiomatic, slang) To vomit chunks of undigested food.

Wiktionary

(idiomatic, slang) To suffer from explosive diarrhea.

Wiktionary

(idiomatic, slang) To be very bad, inadequate, unpleasant, or miserable; to thoroughly suck.

The old version was okay, but the new version blows chunks.
Wiktionary