What is Pat ?
Pat is (noun) 1. a little tap with the hand I didn’t hit her I just gave her a little pat. a pat on the back praise The committee got a pat on the back for having organised the show so well. 2. a pat of butter a small round piece of butter (verb) to give someone or something a pat He patted his pocket to make sure that his wallet was still there. to pat someone on the back to praise someone
source: Easier English, Student Dictionary Upper Intermediate Level