New Years' Syndrome

Deciding that you going to do something new, too change your life in some way for the better or to achieve something but then becoming to Lazy to commit to it after a while and eventually giving up. Based on new year resolutions that you never keep

Saying that you have decided to go to the gym to get more fit and healthy but after a few days/weeks you start putting it off and then you give up and stop going to the gym. Usually happens during the period of New Year's eve/day and thus the Name New Years' Syndrome is appropriate.

Jonny White

Saying you're too 'drunk' or to 'tired' to go out and then end up having an amazing night.

You did a Jonny white last night