When you are smoking the last bit of pot in a pipe, and one of the hot ashes shoots through the bowl and hits the back of your throat. Can usually be seen as a bright orange ball flying through the length of the pipe if it is made of glass.
*coughing* Dammit! That pot comet just burnt the shit out of my throat...
by Mike Coff May 03, 2006
1 more definition
its when you are getting your pot out of it's medium of transportation, and the shake flys all over the place..
"Hey man ill pack a bowl, here let me get my pot... oh shit, pot comet!"
by Officer O'Reily May 08, 2005