bunting time, n. — Green’s Dictionary of Slang

bunting time n.

[fig. use of bunt v.¹, to have sexual intercourse]

summer.

c.1698		B.E. Dict. Canting Crew n.p.: Bunting-time, when the Grass is high enough to hide the young Men and Maids.
1725		New Canting Dict.
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict.