table grav 

a gravity bong collected from leftover weed/marijuana on your table. usually collected out of desperation and often times includes non-marijuana material such as dust, dirt, food, etc.

Do we have any weed left? ..No man, we're out. But you might be able to scrape enough weed off the coffee table for a table grav.

table grav by surfing cowboy from alpharetta November 19, 2010

table gravy 

The mixture of liquid and food waste on a table, fresh or dry. When dry it is often sticky.

Peter: "Aw man... someone left us some table gravy..."
Jimmy: "Eww... it's all dry too. No use trying to clean that up... Let's find another seat."

table gravy by Jerkoffjacklick September 6, 2016