The act of declaring that one is good at something right before fucking it up.
Derives from Star Wars Episode III: Revenge of the Sith where Anakin Skywalker says this to his former master Obi-Wan Kenobi right before lunging at him and getting his left arm and both of his legs cut of by a lightsaber.
A cunning retort to a rather mundane story relayed by an acquaintance. The slight distortion of the word
"interesting" leaves the relayer of the story stumped as to whether you're utilizing a benign permutation of "interesting" a la Ralph Wiggum's "Me fail English, that's unpossible," which would therefore retain the original meaning, or if you are simply shortening "uninteresting" and subsequently would like them to shut their boring yapper before you fall asleep with your fingers in your ears.
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.