Fractious/ˈfrækʃəs/ Definition 1 of 3Pro Tip 1/3Mood Trigger Fractious often describes someone easily upset, especially by small things. My roommate was fractious after a poor night's sleep. Pro Tip 2/3Emotional Tone Use 'fractious' to suggest a negative, grumpy attitude, not just tiredness or hunger. The fractious toddler threw his toy across the room. Pro Tip 3/3Not Always Bad 'Fractious' doesn't necessarily mean someone is always difficult; it can be temporary. She gets fractious when her routine is disrupted.