Something you say to lighten the mood. It has no literal meaning, just that you can say it in reference to a question or just out of the blue for a laugh. The way you mean it comes from your tone of voice!
M: Hi K's mom.
K's mom: Hi M, how are you?
M: I'm good thanks.
K's mom: How's school?
M: It's okay.
K's mom: How's work?
M: Hard.
(K's mom asks a series of more annoying questions)
M: It's ALL skipitty-skopitty.