When you accidentally call every member of a large group chat on Microsoft Teams instead of the single person you tried to call.

To send a Snapchat video of you/your friends taking a hit from a bong/bowl/joint/blunt, prompting your recipients to reply with a video of them taking a hit.

similar to "reply chug"

When you write a response to someone's comment on Facebook (or other social media) but before hitting reply, you stop and delete it because you realize that by posting your response you're about to engage in a painful online conversation that you'll only regret. It's as if future regret went back in time to the present to warn you. Inspired by Marty McFly from Back To The Future.

When you receive a message via cell phone or similar which is deemed low-priority, and which you delay replying to until you later use the toilet and have some time to fill.

A form of YouTube spam where YouTube users, typically idiotic women with oversized breasts, decide to upload a video entitled "RE: Videoname" and post it as a video reply. As a result, they manage to fill the "Related Videos" section of YouTube with a plethora of breasts, as opposed to actual content that's actually related to the current video.

Most YouTube users view Reply Girls as a nuisance. There are some people who enjoy the Reply Girls, but all they look at are the thumbnails with their exposed cleavage, leave a stupid-ass comment, and then leave the video.

An act of reply courtesy occurs when you are forced to keep the conversation going by either creating awkwardness or changing the subject because the person you or texting or instant messaging replies with a conversation killer, words such as, "ha, yeah, mhm, lol, ect."

Dumb bitches that reply to every possible youtube video they can in order to take advantage of the money youtube gives out for views. They often make sure that their video thumbnails is a zoom-in shot of their cleavage in order to sucker men into clicking their video links. The poor bastards never realize what they're getting themselves into, until it is too late. About 99.9999% of the reply girls are dumbass butter faces, hence why they focus on their tits and their monologues are retarded. Some even have the audacity to complain about people only clicking the link for their boobs; despite that being the main focus of EVERY FUCKING THUMBNAIL THEY HAVE.