"Bentenut" is a word/joke about the nick thath was given to my bike.
She is named "Bentenuta" that means litterally "well-kept", since the bike is a 1996 (They also call me "Bentenuto" sometimes ).
Pimp My Bentenut is, then, a joke from "Pimp My Wheel" TV program
Yeah, I also sometimes watch MTV's "Pimp my ride". They should have a program where they pimp up old Harleys, too.
Now I see what "bentenut" means. If Ben/bene means "well", it's also funny, because "tenuta" means "to mess around with booze" in Finnish. So, bentenuta could have a nice double-meaning: to mess around with booze well