Australian rocket scientist 

A manual laborer, expecially one involved in digging, excavation. So called because the Australians are known as "diggers" and regarded as being rather dense.

He was digging a ditch, a regular Australian rocket scientist!

Australian rocket scientist by Tom from the Shore November 10, 2007

Rocket Scientist 

Sarcastic term of praise handed to someone who deducts the obvious and makes sure as many people as possible recognise that they have pointed out the obvious, in an attempt to sound intelligent.

Hey, that car's on fire!

Oh look at the fucking rocket scientist, as if we didn't notice the huge flames, the explosion that we heard so decided to run here etc. Idiot.

Rocket Scientist by Gumba Gumba April 13, 2004

bottle rocket scientist 

A proven meathead. Someone who is a blithering idiot.

That redneck is a bottle rocket scientist.

bottle rocket scientist by DaHolmes January 29, 2023

Armchair Rocket Scientist 

A person on social media who’s only engineering experience is in stock Kerbal Space Program telling people that a team of hundreds who have years of experience don’t know what they’re doing

A person who doesn’t know what the fuck they’re talking about

CS_Skeptic said that Starship can’t fly because the flaps will tear off. What an armchair rocket scientist!

Armchair Rocket Scientist by TheRealSheep5 January 31, 2023

Rocket scientist 

A person who decides to make a simple and easy to fix problem, into a way more complex, intricate and difficult way. Usually done by people who want to seem smart but are really just being a dumbass

i'm just tryna make a Pb& j and you being a rocket scientist about it saying " spread sides evenly and hold together for 2-7 seconds , then cut evenly into triangul-" just shut up.

Rocket scientist by S.bartholomew September 18, 2016

Rocket Scientist 

A title given to player by the SUPER DEEP VOICE guy in Unreal Tournament 3 when you kill 15 players or CPUs.

After killing 15 guys n00b enough to get killed:
ROCKET SCIENTIST!!!

Rocket Scientist by filipako February 23, 2010

Rocket Scientist 

A sarcastic term to describe someone who is Stupid, Irrational and not logical.

That dude over there is a rocket scientist

Rocket Scientist by jOSHdAbEST003 July 19, 2021