Top Definition
the action at which some one, who is nervous, clenches their butt cheeks in anticipation of a specific anxiety/nerve inducing event. -Walking is sometimes difficult, although it does make your ass look out of this world.
Bob:"Hey Todd, how's it going"

Todd: "Not so good, I have a huge presentation today and I have a serious case of TBS,I'm so nervous."

Bob: "Ya you are walking pretty funny right now, but your ass needs space boots, cause it's out of this world."

Bob: "Wait, what's TBS?"

Todd: TBS: Tight Bum Syndrome.

Bob: "Oh ya, that happens to me all the time, actually it's happening right now, give it a feel.
#butt #anxious #clenching #muscle spasm #itbs
by canadiangirl237 November 15, 2011
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.