1. verb In an online platform such as a forum, message board, social media site, etc., to intentionally attempt to antagonize or provoke others by posting inflammatory, irrelevant, or inappropriate messages or other content. The same user kept trolling the message board by posting bizarre images, so we banned him.

2. verb To publicly target someone or some entity for ridicule or mockery, typically online, such as via social media, and often in a coy or indirect way. I love how fast food restaurants are now starting to troll each other on Twitter.

3. verb To stroll. Primarily heard in UK. We trolled around the park before lunch.

4. verb, slang To visit a public place for the purpose of finding a sexual partner. Often said of homosexual men. The days of guys trolling public bathrooms are mostly over.

5. noun A nasty and often ugly person. Likened to the legendary creature of the same name known for harassing people and having a grotesque appearance. That man is total troll—who yells at little kids like that?

6. noun In an online platform such as a forum, message board, social media site, etc., a person who intentionally attempts to antagonize or provoke others by posting inflammatory, irrelevant, or inappropriate messages or other content. Ugh, don't listen to anything that user has to say, he's a real troll.

7. noun An inflammatory, irrelevant, or inappropriate message or other content posted in an online platform such as a forum, message board, social media site, etc., as an intentional attempt to antagonize or provoke others. Don't even bother reading any trolls from that user. He's just trying to start a fight.