troller

Noun

 * 1) One who fishes by trolling.
 * 2) An engine-powered fishing boat, used for moving slowly while fishing lines drag behind, sometimes able to sail in shallow water.
 * 3)  A troll; a user who maliciously provokes others.

Etymology
, of origin, from, which is probably related to.

Verb

 * 1)  to wander unsystematically about, looking for game
 * 2)  to troll