A contraption used to absorb faecal matter excreted via the mouth i.e. verbal diarrhoea. Often prescribed to people who have little to no self conscience, believe everything they say is fact, lack a filter between their mind and mouth, or just talk straight shit.
Complete Tool: "I got my sweet Lada up to 300kmh last night. Pretty insane aye Dad."
Depressed Dad: "Um, yeah maybe its time we got you a facial nappy son."