Be ill-humoured is a phrase that denotes someone who is in a bad mood, irritable, or easily annoyed. If you are tired of using this phrase over and over again, worry not, because the English language has several synonyms for ill-humoured. You can use words such as grumpy, cantankerous, querulous, petulant, irascible, morose, testy, or touchy to describe someone who is in a bad mood. Alternatively, you can opt for other phrases that mean the same such as "crabby," "surly," or "bad-tempered." Using synonyms for "be ill-humoured" can convey the same meaning while adding variety to your language.