Lot of slangs! Not high cultured person's saying. He/She is always f**kin claims/squeals everything we do. We bet our lives. Never say so, even if it's d**n joking. Maybe you found it from text, right? Here's easy Japanese you could read. 彼／彼女はいつも私たちのすることの苦情を言う。私たちは命を失うかもしれないのに、冗談を言うな。 And title is bit wrong. We say '文章を英語に訳してください。'. :) Go for it!!