Excuse Cloud

To give a reason against something which isn't the actual reason one is against it.

An example of excuse clouding is easily seen in terms of a fictitious conversation:

Jack: "Want to go to the movies?"

Jill: "I don't have any money." (When in reality she just doesn't want to go see that movie).

Jack: "I'll pay for you."

Jill: Some other argument other than just saying she doesn't want to see that movie.