Si Slag is an older verizon of the Slag, this is the woman with the 15 yrs of smoking in her voice, or the 35 yr old trying to flirt with the 23 year old guys.
Yo, that bitch at the bar with the leather skin from all those tanning beds is definately a Si Slag.
by Chuck Tooth February 20, 2005
Get the Si Slagmug.