Lack of enthusiasm.
Either sarcastic enthusiasm, or from boredom.
1) Woop. Wa-hey. Yeah. This is fun.
2) Nice going with the unthusiasm there.
by Blue Jack October 18, 2009
Top Definition
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."
by Jedimintrick October 25, 2006

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.