Words And Otherwise

Many a times in office or elsewhere, I use words which would not be understood by others. But I get a kick out of seeing their puzzled faces and confused looks with such word play. And many a times when people do not get the joke, thats even better.
Coworker: Aren't my feet looking better than before?
Me: Oh yes, they look less knobbly.
Coworker: [Confused and Unsure] Knobbly?
Me: [Exiting hurriedly]