sealion

Etymology
The verb is from “The Terrible Sea Lion”, a 2014 strip in the webcomic , in which a character expresses a dislike of sea lions and a passing sea lion repeatedly, intrusively asks the character to justify this.

Verb

 * 1)  To intrude on a conversation with disingenuous questions in an attempt to engage in unwanted debate as a form of harassment.

Noun

 * 1)  One who engages in sealioning.
 * 1)  One who engages in sealioning.