Yeah, there's mortal sin and venial sin.
Mortal sin will land you in hell if you don't make it to confession to confess them before you die. Things like murder and divorce are mortal sins.
Venial sins are more like lying and will result in an extended stay in the torture chamber of purgatory.
Of course, the Catholic church can re-categorize the sin depending.........
And I think you can fill in what the depending is pretty well. (Think Kennedy)
Since you are a self-professed former Catholic who purports to know all thing Catholic you should know better, but I guess that's what makes a lie a lie.