[f. BUTT v.1 + -ER1.] An animal that butts.
1611. Cotgr., Cousseur, a butter or iurrer.
1883. Fifesh. Jrnl. 10 May, 3/6. The zodiacal sign for the opening of Winter is a goat. goat is a hard butter, and hard butter is almost always a sign that the weather is cold.