God: T-REX CAN I BORROW YOUR HOUSE FOR A THING
God: IT'S LIKE
God: A GOD THING
T-Rex: Sure, knock yourself up!

God: WHAT
T-Rex: Feel free, dude!

God: NO BUT YOU SAID KNOCK YOURSELF UP
T-Rex: Oh, is that not the expression? Sure, knock yourself... off?
God: OH NO T-REX
God: ARE YOU A DUDE WHO IS BAD AT IDIOM
God: WHY DIDN'T YOU TELL ME SOONER

T-Rex: I'm not! Knock yourself... around?
Utahraptor: The expression's "knock yourself out!"

T-Rex: Um, it's dumb that "get your brain damaged" means "do what you want".
Utahraptor: Dunno what to tell you, dude. It's almost like English wasn't designed, but rather coalesced around folks who just wanted to do what all language speakers do: find more persuasive ways to convince others to boink 'em.

T-Rex: I was going to retort, but suddenly realized I couldn't see any way that would increase my Boinking Potential!
T-Rex: OMG
T-Rex: IT'S ALL TRUE