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".
by Arabella pinkerton June 13, 2017
Get the Doing a Theresa mug.
A female well known for being an easy piece of pussy. Famous for her house party's (sex parties). A slut who was always drunk, high or trippin on acid and tripping over dicks the next morning.
Did I really fuck Theresa Cummings last night? Shit, No I have Herpes.
by Azzman66 September 14, 2018
Get the Theresa Cummings mug.
When you have exhibited behaviour that is similar to that of a Theresa. Typically, this is fun, happy, having a good time and smiling. Theresa Syndrome will sometimes describe someone who is having a laughing fit. It can also be used to describe someone who is likable, cute and kind.

Theresa Syndrome is a good thing to have.
- "Stephanie is having a great time! She is such a nice girl!"
- "She must have Theresa Syndrome".
by Rob Turner April 28, 2009
Get the Theresa Syndrome mug.
The sexual practice of fucking the police up the ass while taking a dump on the prison system.
The Prime minister of England is "Doing a Theresa" again.
by D. Grey March 29, 2019
Get the Doing a Theresa mug.