(impersonal, of the weather) to be bad

unwisely, not using one's best judgement

(informal) in a bad mood, crabby, ratty, grouchy

(of a currency) of bad quality, of doubtful worth / (figuratively) improper, inappropriate, unsuitable; unsavoury

(informal) to make a bad impression, to give a bad impression, to make someone look bad and disreputable

inauspicious, which doesn't augur well

a bad workman always blames his tools

(idiomatic) to start off on the wrong foot

(transitive) to take a dim view of, to look unfavourably on, to frown upon

(informal, figuratively) to go through a spell of poor health, to be coming down with something, to get in a bad way / (informal, figuratively) to be headed for trouble, to be circling the drain, to go downhill