Literally, "birds from the same stone." An abbreviation of the famous cliche, "Kill two birds with one stone."
If we buy beer at the grocery store we can kill two birdstones.
by jpc1 June 14, 2011
2 or more birds with one stone, generally gratuitous multitudes of birds with one stone.
The way you swooned that fly chick, had a filling lunch, cured aids and gained superpowers with just one mouthful of powerthirst is totally birdstone!
by xequals.co July 20, 2011