Obs. or dial. Also 8 jirt. = JERK sb.1
1568. Jacob & Esau, I. i. Come on, ye must haue three iertes for the nonce.
1607. Markham, Caval., II. (1617), 40. Giue him a Ierte or two vpon the nether part of his buttocks.
1611. Cotgr., Attainte, a gentle nip, quip, or iert.
1785. Burns, 2nd Ep. to Lapraik, ix. Shes gien me monie a jirt an fleg.