a roll in the hay
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roll in the hay
A sexual encounter, often one considered casual. You know, you can try to get to know the girls you date before you have a roll in the hay.
a roll in the hay (or the sack)an act of sexual intercourse. informal
1998 Barbara Kingsolver The Poisonwood Bible He just treats me like his slave-girlfriend-housemaid, having a roll in the hay when he feels like it and then running off doing God knows what for months at a time.