Definitions

1. adjective

given to secret and stealthy movement or action

“The sneaky raccoon snuck into the trash can at night.”

2. adverb

in a secret and stealthy manner

“She walked sneaky through the dark forest, trying not to be heard.”

3. noun

a person or thing that is given to secret and stealthy movement or action

“The sneaky culprit was never caught.”