cari istilah yang lo mau, kaya' wcw:
 
1.
The act of feigning enthusiasm.

Usually sarcastic, but can sometimes be a means of gratifying a dull anecdote.
"I had to use my unthusiasm to get rid of that guy."

"Hey man, no need to use unthusiasm on me."
dari Jedimintrick Rabu, 25 Oktober 2006
 
2.
Lack of enthusiasm.
Either sarcastic enthusiasm, or from boredom.
1) Woop. Wa-hey. Yeah. This is fun.
2) Nice going with the unthusiasm there.
dari Blue Jack Minggu, 18 Oktober 2009