prat

peppu puhekieltä A cunning or mischievous trick; a prank, a joke. (defdate)
puhekieltä cunning Cunning, astute. (defdate)
puhekieltä A buttock, or the buttocks; a person's bottom. (defdate)
Thomas Dekker, 1608 , The Canters Dictionarie in The Belman of London (second part Lanthorne and Candlelight)

Pratt, a Buttock.

Mungo didn't like their attitude. Nor did he like exposing his prat in mixed company.

"She's a far better pieceThan the Viceroy's niece,Who has also more fur on her prat."

"...they would kidnap a girl and take her back to their camp where they would pull down her knickers, hoping to find hairs on her prat."

"My prat was sore from the unfamiliar activities of the night before, but my virgin bleeding had ceased, and we rode most of the day in that unworldly haze that comes with lack of sleep."