pat

have something off (or down) pat have something memorized perfectly.

on your pat on your own. Australian informal

☞ This expression is from rhyming slang, Pat Malone meaning 'alone'.

pat someone on the back express approval of or admiration for someone.

stand pat stick stubbornly to your opinion or decision. chiefly North American

☞ In the card games poker and blackjack, standing pat involves retaining your hand as dealt, without drawing other cards.