Worst Thing To Do On Your First Move

Offer draws forever

Say you have to go to the bathroom and start flushing the toilet forever and make your opponent have a headache.

Have 10 girlfriends watch you play and have them make kissing noises.

https://youtu.be/jMT4tOvJThA   Or this  like Chucky nr 1

https://youtu.be/S1WyXJb9MmA  Or like this in Chucky nr 2 lol

Here the nice Chucky!   https://youtu.be/S1WyXJb9MmA 

Forget that it's your turn and lose on time.

Whoever gets the 500th post gets a trophy

middle finger your opponent

a4

I've only seen people who don't know what they're doing play this, usually followed by h4.

I believe it's called "flipping them off"

That's better!

Attach a bomb to the game clock.

I've seen a couple of Engine Cheats in 10/0 play 1.Na3 then 2.Nf3. The Engines must have those lines worked out - and all the others.

1.e4 e5 2.Qh5 and then you accidentally touch your king.

Checkmate yourself

Suicide

1. h4 and 1.g4 are the worst moves for white . Or commiting suicide.

Be a GM and start cheating and lose your title.

1. f3