you got owned!

something that may be said in a video game, typically a first person shooter, when the enemy is killed by you very quickly, and barely seen onscreen.

could also be said as "ya got owned" or "you got pwned"

enemy: shows arm around corner
me: pew pew
enemy: aaaaghauagau i am dead
me: you got owned!

On your own head be it!

Idiom

used to tell someone that they will have to take full responsibility for what they plan to do

I am telling you, don't get married to her, she is a control freak but if you do then, on your own head be it!

If you want to quit a high-paying job to chase after some fantasy of being a travel writer, then on your own head be it!

You do not have enough brains to tan your own hide

An individual who is so stupid that you could be forgiven for wondering whether they have any brains in their head at all. A total idiot, an imbecile someone who you can’t imagine how they are even functioning.

'You sir, are so stupid that I suspect that you do not have enough brains to tan your own hide'

bring your own guts

Term coined by Clemson football coach Dabo Swinney to describe the mindset players should have for game-day. Clemson will give players on scholarship free tuition, but only the players themselves can bring toughness and determination to their game. BYOG means that players should play hard-nosed football with tenacity and spirit

Dabo: We give you stipends, and meals, and a place to live. We give you nice uniforms. I can’t give you guts. And I can’t give you heart. And tonight, hey, it was B.Y.O.G. Bring your own guts

Not to butter my own toast

A phrase used before self praise in order to make oneself sound more modest

"Not to butter my own toast, but my fit is lookin mega fly today"

Rather eat my own shit

Used to express that you really don’t want to do something.

Are you going to the football game? Hell no, I’d rather eat my own shit.

swimming in a pool of his own piss

Wallowing in a situation that you created and could easily get yourself out of while also trying to make others miserable to make yourself feel better (trying to drag them into the pool as well).

Sam: Have you talked to Rick recently?
Tom: Not really, he's been even more of a jerk since his girlfriend broke up with him. Every time I try, he just makes me feel bad about something. I know he's upset, but he's just trying to make me feel to feel better about himself.
Sam: Sounds like he's swimming in a pool of his own piss and trying to drag you in.