Definitions by Bontempi

Tombstoning 

An activity whereby you see how far you can let a ‘stool’ slip out and still be able to suck it back in.

"General! Sir! Tombstoning complete. I just successfully retracted 2 inches of loaf."

or

"Your Excellency has the air of a man mid-tombstoning."

Tombstoning by Bontempi July 29, 2007