Shit Dribbling out of your Mouth
When someone is utterly bullshitting their way out of something, commonly the failure to attend an event or to give someone something (i.e. gift, debt, etc.)
Bob: Bro, sorry I missed the party, but my girl was all on me last night!
Mike: Dude, your girl was AT the party last night. I can see the shit dribbling out of your mouth, dude.
Mike: Dude, your girl was AT the party last night. I can see the shit dribbling out of your mouth, dude.