When someone has done something silly.
"He's such a joker. What a grindle willy!"
a form of masochism including 2 men and a meat grinder
to grindle; edge yourself multiple times, almost to the point of trance, then stick your genitalia in to the meat grinder and turn it. this is said to provide a higher orgasm, similar to autoerotic asphyxiation. your partner then consumes the shredded meat.
did u hear that paul's into Grindling