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.
by McEmoPants November 8, 2011