A person who likes to suck old men's cock and ball, Sp1nners are well know for wanting to have sexual intercourse with either cute femboys or crossdressing old men who smells of beer and ballsweat
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 MidgetSpinner.
Person 2: Oh yeah, I've heard those are super therapeutic!
Refers to your colleagues that jump out of their chair so fast at 5pm that their chair can still been spinning for a while after they are gone, and you are still working.
HeyJim, Is Suzy still here, I have a question for her? No man, she is a chair spinner.