upslumping

When you're slouching but your chest is not at the correct angle to place objects on yet.

Annalise- Hey Gregg! Do you want to come over to my house on Tuesday?

Gregg- I'd love to!

Annalise- Oh sorry! I've just realised I'm having other friends over on Tuesday. Is it alright if you end up upslumping on the floor?

Gregg- sure Annalise! I don't mind upslumping.