Definition

A crusty, mucus-laden tissue that's seen better days—basically the grossest possible tissue you can imagine. If boogers had a warning label, this would be it.

Example Usage

I found a snarfle on the couch and immediately regretted touching it without gloves.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=snarfle&defid=2149042)