A freshwater and marine fish of the family Centropomidae in the order Perciformes.

Any of various other ray-finned fishes in several families.

To fish for snook.

(as a gesture) A disrespectful gesture, performed by placing the tip of a thumb on one's nose with the fingers spread, and typically while wiggling the fingers back and forth.

To sniff out.

To lurk; to lie in ambush.