Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.

Category: shady activities 
Words: falsification, fib, invent, fudge, cupcake
cupcake

Category: physical property 
Words: sugars, obese, big boned, fat, pasty
sugars

Category: emotional status 
Words: mad, neat, fine, ok, alright

neat