Top Definition
To underestimate the full force of a large lungful of marijuana, usually on the first rip of a session leading to excessive coughing and can possibly induce vomiting.
I underestibaked Justin's bong last night. That first rip had me coughing up a lung for a good ten minutes.
by Steaz December 15, 2010
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.