<p><strong>Verb</strong></p><ul><li>(used with object) to fish for or in with a moving line, either working the line up or down with a rod as in fishing for pike, or trailing the line behind a slow-moving boat.</li><li>to move (the line or bait) continuously through the water while fishing, as from a moving boat.</li><li>to browse through (the internet, a collection, etc.) in search of something.</li><li>Informal: to post inflammatory, inappropriate, controversial, or polarizing messages on (the internet) for the purpose of cultivating animosity, upsetting others, or provoking a response.</li><li>to upset or provoke (others) by posting such messages.</li><li>to make such provocative comments about (others) in public.</li><li>to sing or utter in a full, rolling voice.</li><li>to sing in the manner of a round or catch.</li><li>Archaic: to cause to turn round and round; roll.</li><li>Obsolete: to hand around, as a bowl of liquor at table.</li></ul><p><strong>Noun</strong></p><ul><li>the act of trolling for fish.</li><li>a lure used in trolling for fish.</li><li>the fishing line containing the lure and hook for use in trolling.</li><li>Informal: a person who posts inflammatory, inappropriate, controversial, or polarizing messages online for the purpose of cultivating animosity, upsetting others, or provoking a response.</li><li>a person who makes such provocative comments in public.</li><li>Archaic: a song whose parts are sung in succession; a round.</li></ul>