japanorexia 

Condition of maintaining a svelte figure living mostly on a diet of sushi and sake.

She's been on that japanorexia kick for months, now, lost five pounds.

japanorexia by Nervous Breakthrough May 10, 2010

Janorexia 

the act of starving oneself in january to lose christmas podge

no, i cant eat lunch ive got janorexia

Janorexia by k80s January 4, 2011

Janorexia 

1. the condition imposed by starving oneself in January following holiday indulgences and binges.
2. alternative to perfunctory gym membership sign-ups, or diets to satisfy one's new year's resolutions.
3. reference to anorexia

I thought my sweetiepie was hitting the gym all month to fit in those jeans but it turns out it was a case of janorexia.

Janorexia by theQueeb January 3, 2012