Pulling a Corbyn 

Telling someone your taking them out and changing your mind last minute,

I told the misses I was going to take her for a nice meal on her birthday for months but I don't fancy it so I'm pulling a Corbyn and staying in instead.

Pulling a Corbyn by Nelderd November 9, 2019

Pulling a Corbyn 

Going into a task with unwarranted confidence and bravado and falling flat on your face.

"I can build this ikea wardrobe in a hour" 4 hours later as you have a mental breakdown you think to yourself "Im pulling a Corbyn, should have just paid for the assembly service".

Pulling a Corbyn by Bojo1 January 15, 2020

Pulling a Corbin 

When you insist a 2 year old product that costs half as much as the new model, is better than the new model.

Phil: "My GTX 550 ti is better than your GTX 660".
Paul: "Phil, That's rediculous, stop pulling a corbin".

Pulling a Corbin by arexr November 18, 2013