look up any word, like the eiffel tower:
 
1.
When fat people fall asleep randomly, and at inopportune times. A cat nap...for fat people.
Damn, Craig's taking a fat nap again!
by Dmizzle2 December 19, 2006
 
2.
A fat nap occurs when an individual sleeps with a larger person of the opposite sex but does not engage in sexual activities with this person. The fat napper, the slimmer person or individual who executes the fat nap, often awakens from this experience feeling rejuvenated and refreshed. However, there are no positive or negative side effects for the fat nappee, the larger individual in the fat nap.
Friend 1 : "Did you hook up with that fat chick last night from the party?

Friend 2: "Nawh, I just copped a fat nap and I feel great"

Friend 1: "Yeah, fat naps are like Red Bulls - they give you wings!"
by DT-ILM December 09, 2009
 
3.
Similar to a cat nap, but induced by the consumption of food. Most common occurrence is after a Thanksgiving dinner.
Man, after all that turkey, I'm stuffed. I'll just unbutton my pants and take a little fat nap.
by randymcgr February 11, 2011
 
4.
To kidnap a Fat person.
I fatnapped that big fat fatty Christine and shoved lean cuisines down her throat.
by NykkiM January 13, 2009