Thomas: I'm agnostic!
Anya: I'm agnostic, too!
Thomas: That makes us a diagnostic!

Person 1: I know these Siamese twins who think the existence of God is unknowable.

Person 2: Ah, yes, another case of diagnosticism.
by Thanya October 20, 2012
true hell worse than having a 3 month surgery
teacher: hey time to do iready diagnostic
students: hey iready is already bad iready diagnostic is worse :(((((((

a few years later

student 1: i got a score of 1
student 2: not bad i got a score of 0.9
the annoying nerd: haha losers i got 30
class: SHUT UP NO ONE WANTS YOUR BRAGGING
by backwards_cones March 4, 2021
righ-sir-die-ag-nos-ticks

1) A person who clearly has no idea about how car engines work, but will add up all the engine modifications he has/plans to get with preconcieved horsepower figures to show how fast his car is.

2)A person who looks like hes working on his engine, but he's really just making sure his intake didn't fall off yet and he has no idea what he is doing or what is wrong with his car.
1) (man performing ricer diagnostics) "yea, well the car has 120 hp stock, but i got a intake, muffler, and performance tuner, so its got like 160 hp now, cuz the intakes 15 hp, the mufflers 15 hp, and the chips 10.

2) yea man, theres smoke coming outta the transfuxfibulator there, i just gotta retune my muffler bearings and it should be even faster than before.
by unclepeanuts April 26, 2011
Used by "Do It Yourselfer" to find out what's wrong with something. Person that uses Google search engine to check forums and topic specific web sites to find what part they should throw at the problem. Can be used for a check engine light on a car to a washing machine or a PC with the blue screen of death.
My engine light was on so I did a Google diagnostic and all the people on the forums say it needs a putooter valve. I replaced it and my lights still on,wtf
by kirbside September 2, 2015
A specially developed diagnostic tool used by the EPA that seeks to assess the concentration of methane in a mammal’s farts.
Our staff meetings, as a whole, could benefit from a Diagnostic Fart Assessment, since passing gas is our primary mode of communication.
by Dr Bunnygirl March 26, 2019
Tikh: Hey where ya headed to so fast?
Dylan: I just had my morning coffee, and now I gotta run some diagnostics on the commode!
by Lil' Enyaw December 11, 2016
A new religion that IT technicians can call their own.
Hey man, wanna join the religion I just created for technicians, geeks and nerds? It's called diagnosticism.
by DelphinusMinor May 16, 2010