My dog just died
A phrase used to get out of a situation that you don't want to be in. Works best if you have no dog to begin with, and the person doesn't know you all that well.
Example:
Steve "Kevin you wanna come over and watch Night at the Museum 2 with me and my parents?"
Kevin "Oh I would, but my dog just died."
Steve "Kevin you wanna come over and watch Night at the Museum 2 with me and my parents?"
Kevin "Oh I would, but my dog just died."