The sign for "wolf down" as in "consume rapidly" starts as a "bent
hand" and (usually) changes into an "S" hand (fist) as you move it
backwards.
WOLF-DOWN:




WOLF-DOWN (side view)




Notes:
Sometimes you might see this sign done without changing it into an "S" hand.
That is just another version. It means the same thing. I suppose a case
could be made that if you don't change the handshape into an "S" that this
sign would mean "swallowed it whole" but really, that is just the armchair
linguist in me looking for nuances in meaning. Just nod your head indulgingly
and move on to some other page.
See: EAT
See:
PIG-OUT
See: WOLF