Dumptongue 

Always talking shit or you are full of shit.

I don't believe a word he says, he's got some serious dumptongue

Dumptongue by Bugpartsoup August 19, 2022

dungtongue 

Nonsense;
Shit-talk (metaphorically);

Did you follow that guy at all? Sounded like a load of dungtongue.

dungtongue by draculich May 4, 2006

dungtongue 

Dungtongue, is one who licks anothers, or their own anus.

You are such a dungtongue!

dungtongue by Lucas wood April 21, 2006