It is a slang for people who are irritiating, annoying or just having their head PURE STUPIDITY that cannot READ REPLIES.
Person1: " Buddy youre a snack, possum. "
Person2: " Yeah I know ): "
An attractive male practicing medicine, specifically anesthesiology
That snack in the white coat takes my breath away.
a smack assen good lookin nigga that is lookin hella fresh
ayy Shaniqua look at that 65 year old man he be lookin like a snack
ooh, he is lookin pretty smexy like my uncle joe....