The sexual act of lying down
on your back with an erection, and having a
little person sit on your dick (
vaginally or anally). They then lift their legs up, you grab them by the sides, and spin them around super quickly like a Beyblade.
Example
Person 1: Man, I'm feeling so relaxed. Got a three foot tall hooker
last night and gave her a Midget Spinner.
Person 2: Oh yeah, I've heard those are super
therapeutic!