what's your best move when losing?

My best move when losing is to win.

My best move when losing is to have a cup of tea 2 sugars.

If we are playing with his Chess Pieces. Call "Adjust"! Then Extend your right arm across your chest and violently swing the back of your right hand across the board with as much force as you can possibly muster. With any windage at all, finding all the pieces might become a real chore or project, this may give you some satisfaction after being beaten on the board. Don't expect a lot of rematchs tho' using this technique!

 I just lost my first game at this site and could only take a cyber swat at my opponents pieces.

use whirlwind attack as adapted from pokemon. Take ur king and continue to spin him violently in a circle while knocking over all of your opponent's pieces. it is a valid chess move and i have never lost a game when using it. although it takes time and a complex understanding of chess to pull off.

Once I used the heavenly whirlwind kick. That I got off dragon fist. Cool maybe I should try this one.

Hyper Beam is my personal preferrence. The last guy I used it on still hasn't recovered.

That'll teach him to pin my queen.

All very innovative, very colorful moves. 

My daughter used to tip the board when she was 8. Now she just stares at the board until you get pissed and her to make the move. She'd say she is making it.. make the piece move with her mind. Lol.

I chalk up my pool cue and knock my opponent's King off the table. "Scratch!!"