When a man, is making love to woman, in the doggy style position, with his right hand, he acts as if he's gripping the throttle on a motorcycle handlebar. With each rev of the imaginary throttle, his thumb hooks down, and is inserted into the woman's anus.
"I was taxing this slut from behind, and I slipped her the Old Kawasaki."
"You have to be careful with the Old Kawasaki, sometimes you end up with brown thumb."
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. PenguinBooks,1992. p. 38)