frot, v. — Green’s Dictionary of Slang

frot v.

[Fr. frottage, rubbing (in a sexual context); note Urquhart, The Complete Works of Rabelais (1653): ‘These two did oftentimes do the two-backed beast together, joyfully rubbing and frotting their bacon against one another’]

to rub up against (for sexual pleasure and usu. in a clandestine manner); thus frotteur n.

1973		Observer 11 Feb. These transvestites, nymphos, junkies are in hell. They frot and turn on [etc.].
1999		K. Sampson Powder 215: Frotteurs squeezed through the tightest-packed galleries, squirming with satisfaction.
2000		S. Maloney Big Ask 235: You want to frot me in a telephone booth?
2007		L. Redhead Cherry Pie [ebook] She was practically frotting him.
2024		J. Meades Empty Wigs (t/s) 180: She held up a warning finger to a wall-eye who made to frot against her bustled buttocks.