2) Having a large amount of fecal matter in your body, usually necessitating a dump.
Stan: "Man you're so full of shit, your eyes are brown."
Eric: "Yeah, I guess you're right, I really need to drop a massive deuce in the john."
1)The quality of making spurious or exaggerated claims
2) Deceitful or dishonest
3) Glenn Beck
"That gentleman is full of shit."
I am Full of shit, talking a load of crap, lies ,makes up own accout of things, to try to look good.