The act of mansplaining to not only women, but men as well. The individual committing the act believes he has a wealth of knowledge far beyond what he actually does. This includes subject areas in which the individual has absolutely no experience.
Caution, correcting the offender will have little to no affect on his behaviour and is likely to cause him to explain himself further, digging an even deeper hole.
Person 1: Man, he won’t stop Tysplaining
Person 2: I know! Last week he explain the circulatory system to a cardiologist. He got all of his facts wrong.
When a trans-person tries to explain your sexual identity or orientation to you contrary to the fact that this is a personal choice and everyone has the right to identify as they please.
Person A: I'm super-straight
Person B (trans): That's transphobic, genital preference isn't a sexual identity..
Person A: Please don't transplain to me, I know what I am and it's not for you to decide. Transplaining is superphobic.