The term IN A FOUL MOOD can be described by a variety of words, all of which have 6 or fewer letters. These words include CRABBY, SORE, CROSS, SULLEN, IRATE, SOUR, SNARLY, and TESTY. Each of these words has a slightly different connotation, but they all generally refer to a negative emotional state. CRABBY implies grumpiness, SORE implies physical pain, CROSS implies anger, SULLEN implies sadness, IRATE implies rage, SOUR implies bitterness, SNARLY implies aggression, and TESTY implies irritability. All of these words together paint a picture of someone in a very bad mood.