choke a troll = smoke a bowl. used to try and sound unsuspicious around teachers/cops/authority figures. probably doesnt work, but its a good way to confuse people. "Poke a mole" also works. i guess anything that rhymes with smoke a bowl.
stoner 1-"want to go choke a troll in between some garages during lunch?"
stoner 2-"do i want to what?"
stoner1-"cmon, you know... chOKE a trOLL"
stoner2-"uhhhhmmm, yeah. sure."