Facial Filter - A facial filter is when you pour your drink over your mustac

A facial filter is when you pour your drink over your mustache to keep the gross stuff from going down your throat.

I poured my coffee on my mustache to keep the sludge out of my mouth.

I drank my tea like a filter, using my mustache as the sieve.

I poured my soda on my mustache so I wouldn’t have to swallow the sludge.