Doing a Theresa 

Trying to move from a good position to a best position and ending up worse off ; cf the old adage "The Best is the Enemy of the Good"

Theresa May is the UK Prime Minister whose Conservative Party had a a working majority in the UK Parliament . She tried to increase the size of that majority by calling an election on 8th June 2017. Although the largely Conservative Party supporting UK Press predicted a landslide victory she in fact ended up losing her overall majority the major oppostiion Party (Labour ) having gained 30 more seats than they held before the election. Theresa May has now lost her overall majority and is in a greatly weakened political position. Whence the expression "Doing a Theresa".

Doing a Theresa by Arabella pinkerton June 13, 2017

Doing A Kate 

A person that married someone that vomited on them

Im doing a Kate, the pickings are slim at closing time

Doing A Kate by Fuck Scotty from marketing October 14, 2019

Duolingo 

The living embodiment of Satan; will do anything he possibly can to make you pay for your absence on his spanish lesson, you bafoon.

Hey! Last night, I skipped my lesson on Duolingo!
What happened next?
Remember my kid?

Duolingo by DracoBoom October 29, 2019

Trust Me, I know what I'm doing 

A phrase often usd by people who don't really know what they're doing.

This catch phrase was often used by the 80's TV cop Sledge Hammer right before he does something that results in some sort of catastrophic event or disaster.

Captain Trunk: Sledge, you cannot disarm that nuclear bomb!

Sledge Hammer: Trust me, I know what I'm doing.

(A nuclear explosion ensues thus ending the season finale of Sledge Hammer)

Trust Me, I know what I'm doing by d_art July 10, 2005

dutch doging it 

when a unfit male and female decide to have doggystyle and get tired so they resort to doing a dutch oven and the male effectively ejacluates as a result of this

dude i got to hit the gym i was dutch doging it last night

dutch doging it by tabwasere September 18, 2012

I can tell you are doing it 

I don't know what you are doing, but I can tell you are doing it wrong.

This is a humorous way to point out bad problem solving methods.

I don't know what you are doing, but I can tell you are doing it wrong!

I can tell you are doing it by I, Wreckerrr December 11, 2020

Duolingo Bird 

The bird who stole your family including your kids and doesn't feed then until you learn a diffrent language.

New York Times: A mysterious bird named "Duolingo Bird" might be the suspect of dead victims. This is because people didn't learn any new launguages in 1 day.

Duolingo Bird by packtober April 4, 2019