1 definition by Neeems

Slang word used in Northern Virginia to refer to the sleeping aid hormone melatonin... sometimes sold as fake "roofies".
Guy 1: Man I tried to knock that prude ass girl out with some roofies, but they ended up bein' some lousy ass tonin'!

Guy 2: Aww what a shame bro.
by Neeems January 1, 2010
Get the Tonin' mug.