it's not science rocket

derogatory form of "it's not rocket science" (capable of being accomplished with ease; posing no difficulty), intent on mimicking the ignorance of the recipient.

"what do you mean you don't know what the address bar is? It's not science rocket."

Rocket Science

What you should say to someone that fried their braincells.

Person 1: damn. I wonder how to turn on the stove.
Person 2: dumbass.. this ain’t Rocket Science
Person 1: stfu

Rocket science

Quintessential observation of a difficult job

Gavin delander- for fucks sake it’s not rocket science