WOLF: The American Sign Language (ASL) sign for "wolf"
 

The sign for "wolf" show a wolf's snout.

WOLF:
 
 

WOLF:  front view:
 

If you were discussing the concept of consuming something quickly or to wolf down you could sign:

Sample sentence: WOLF SLEEP DURING WINTER?

If you want to learn more animal signs, check out:

Compare the sign WOLF to the sign SLEEP.  The sign WOLF is different from the sign SLEEP in that WOLF moves forward as opposed to SLEEP which moves down.
See: SLEEP

Notes: 

Also see: BEAR

Also see: FOX

Also see: ANIMALS