pibble

(noun)- the left-overs in a container or vesicle that are impossible to get to or make use of.

"I wish I could get this pibble!"

"Throw away that tube of toothpaste/tub of butter/bottle of Yazoo, there's just pibble in there"

[moop]

(adj.) irritating, depressing, less than satisfactory. Can be used in both the present and past tense.

"School today was so moop."

"I'm feeling moop. Everything is rather moop."