A friend or object that you keep close when you are nervous about a certain situation that frightens, or anytime there is a literal thunder storm.
John: Ah! what was that?!
Ted: Thunder, don't worry, I'm here thunder buddy
John: Thunder buddies for life, right?
Ted: You know it
Ted: Thunder, don't worry, I'm here thunder buddy
John: Thunder buddies for life, right?
Ted: You know it
by teddybearseth April 06, 2012
http://www.urbandictionary.com/define.php?term=Thunder%20Buddy