Top definition
When someone Shits there pants after laughing so hard they cannot stop it from coming out.
After Bobby told a hilarious joke I was laughing so hard it was ShatNastic.
by BlindMan27 January 25, 2009
Get the mug
Get a ShatNastic mug for your buddy Yasemin.

Available Domains :D

  • shatnastic.se
  • shatnastic.com
  • shatnastic.net
  • shatnastic.men
  • shatnastic.org