The act of punching a hole in the bottom of a beer can with simply one's thumb in order to obtain a perfect opening
to shotgun said beer.
An expert
lapping would entail using ones lower canine tooth to pierce the top of the just
shotgunned beer and tear off the cap of the beer.
"I want to shotgun! who has a key?"
"We dont need keys, Dan's lapping the beers for us!"
"Hey, guys! I just
lapped my first beer!"
"Wow, I'm drunk. I just got dont lapping about 6 beers in a row."
"How did you do that!?"
"I just lapped it"
"He can
lapp beers!?"
"yeah he's a
lapper!"