a roll in the hay (or the sack) an act of sexual intercourse. informal
2013The Age (Melbourne) Someone turns up moidered. Turns out [it] was the butler's illegitimate son from a pre-war roll in the hay with Noni's half-sister.
英语词组固定搭配大全包含15956条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。