gravy mouth 

When a chick gives you a blow job after a night out of partying and possibly involving some cocaine (the white). Typically administered by a lady of the night or queen of the brass staff.

Man dog....I was rock hard ready for that special attention from this chick and then she hit my with that gravy mouth. It was lose of hardness from that point on.

gravy mouth by La'Roi Whiskeytaco February 22, 2017

grave mouth 

The inability to taste or detect a flavor that may range anywhere between mild to extreme, such as sour, sweet, or spicy. You either have hypogeusia, ageusia, or your taste buds have been dead for years.

Shayne: What a fine meal.

Garrett: How are you not tasting the malic acid?! It's so supposed to be sour!

Shayne: I have grave mouth.

grave mouth by aaw1 November 5, 2021

grave mouth 

When you eat something in extreme flavour, whether that be sour or spice, and it has little to no effect to you.

Noah: That is so sour!

Shayne: No it's not

Noah: I mean I guess you have grave mouth.

grave mouth by TruestBlu November 14, 2023

digging your own grave with your mouth

A metaphorical phrase to describe the common practice of eating yourself to death.

Well my friend, it seems that you are highly unable to stop digging your own grave with your mouth!

digging your own grave with your mouth by Dr Bunnygirl October 2, 2019