Procure por qualquer palavra, como eiffel tower:
 
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."
por Jedimintrick 25 de Outubro de 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.
por Blue Jack 18 de Outubro de 2009