WordWeb Online

1. [vulgar] The fleshy part of the human body that you sit on
   "he deserves a good kick in the prat"
   - buttocks, nates, butt, backside, bum, buns [N. Amer], can [N. Amer], fundament, hindquarters, hind end, posterior, rear, rear end, rump, stern, seat, tail, tail end, tooshie, tush [N. Amer], bottom, behind, derriere, heinie [US], derrière
    
2. Insulting terms of address for people who are stupid or irritating or ridiculous

Derived forms: prats

Type of: body part, disagreeable person, unpleasant person

Part of: body, torso, trunk

Encyclopedia: Prat Prat, Côtes-d'Armor