Used mainly of animals or figuratively of people when they poke or search with the nose; attested in major dictionaries.
Synonyme
poke around
nose (around)
nose around
tattle (on)
nark (on)
dob in
grass (on)
squeal (on)
rat (on)
snitch (on)
inform on
Attributive noun use (e.g. snout beetle, snout moth) qualifies as adjectival in the dictionary model.