v. & n.
v. 1 intr. sing out in a carefree jovial manner. 2 tr. & intr. fish by drawing bait along in the water. 3 intr. esp. Brit. walk, stroll.
n. 1 the act of trolling for fish. 2 a line or bait used in this. troller n.
[ ME 'stroll, roll': cf. OF troller quest, MHG trollen stroll ]