Snoose

Snoose is a term to describe someone that is being nosey or having the intentions to find out information to become an informant (grass, snitch).

"Why are you being a snoose?"
"Stop snoosing around"

The word snoose derives from a combination of a snake and moose. Sly and sneaky like a snake and a moose for added affect.

I saw you snoosing around listening my very conversation, because of you being a snoose my parents know I shat my bed.