The soft ring around a person's waist that comes from smoking pot and getting the munchies regularly.
Mathematically:
(Bonghit + 4 bags of chips, bowl of ice cream, 3 cookies, slice of cake) x daily = belly hangs over pants
"Hey, I'm getting a stoner spare, these pants stayed buttoned last week... Pass the french fries!"
by Gogarty April 27, 2006
Get the stoner spare mug.