Green’s Dictionary of Slang

(Irish) an ignorant man, a slatternly woman.

1903		J. Furphy Such is Life 155: The kintra’s l—sy wi’ sic’ haverils, comin’ sundoonin’ on puir folk ’at henna mickle mair nir eneugh fir thir ain sel’s.
1996		D. Healy Bend for Home 13: He was not to be found. He’d taken with him the only loaf of bread in the house and a pot of gooseberry jam. The fecking haverel, shouted Eileen.