gravy fucker
A person that proclaims something is not as awesome or marvelous as it seems when it most definitely is.
Billy, "Man, I just had a 3-some with these 2 smokin' babes last night!"
Robby, "Killer!"
Andy, "Big deal"
Robby, "Andy why do ya' got to be such a gravy fucker all the time?"
Robby, "Killer!"
Andy, "Big deal"
Robby, "Andy why do ya' got to be such a gravy fucker all the time?"