Kudos to the teen for fessing up the whole story.

Come on fess up. I know you aren't really that sick.

"Fess up or we'll all be caught"

Jane (to John): you're dumb stupid.

Joe: ohhhhh, you just got fessed up.

1.
Person A: I'm goin' to the store - you want something?
Person B: Yeah, get me a dope and a moon pie.
Person A: Fess up some $, biatch!

2.
C'mon baby fess up some of that booger!

3.
Dude, did you get her to fess it up last night?

Don't try and "Fess Me Up"