someone who is down for anything. they’re adventurous & spontaneous, and will always be the first to take on any dare
Bryan: “What are the odds you’d send it down the sledding hill on skies while naked?”
Nick: “1 in 1 bro, I’ll just do it.”
Owen: “Damn what a sender”
by ur b1tch October 25, 2019
A person who doesn't take anyones shit and just does as he/she pleases no matter the circumstances or the outcome.
Guy: What is he doing? He is clearly intoxicated, why would he ever run into a bull pit?!
Girl: It's because he's a sender.
by Playa P April 24, 2018
The act of having sender skates slap some beautiful imagery on your skateboard deck
Brah, I'm totally going to senderize this new deck
by Kevkev666 April 18, 2021
a nigga who denies a good time or is just straight pussy.
james:yo we out tonight
elijah: nah
james: damn you a no sender
by theniggawhosmokedyouup April 27, 2020
A member of any website (in this case, a Neopets user) who sends death threats for fun/amusement. Death threat senders risk being iced (having their accounts disabled, or frozen) just to see little girls squeal and start Neoboard topics about how they're going to die.

Usually, Senders lurk on the Neoboards. Clicking on random (or not-so-random) usernames, they copy/paste threats and send them. Later on, the Senders watch as the people they sent threats to panic, comment on their threats, try to seek them out, or threaten to report them.

Some Senders:

-Teddy (letters were called 'Teddy letters')
-X-Ray (?)
-Saw
-Xuno
-Aidan
-L (based threats on plot of the manga 'Death Note')
-Jigoku Shojo
-*Orochimaru
-*Sasuke

*(based on the Naruto characters, of course)

-Kira (also based threats on 'Death Note')

The above Senders are all members of the FC, or 'Fan Clubs'. Unusually chaotic, these boards are the best targets for Senders. -hinthint-

"I just got the creepiest Neomail from a guy named L..."
"He must be a Sender."
by Sundai November 3, 2006
One's bias towards their own opinion—as a result of being the original poster, sender, or equivalent—on social media forums, especially when accompanied by a sense of self-confidence or entitlement by the sole act of sharing their opinion on said social platform.
Why was the sender supremacist certain that the Earth is flat? Well, it's because he sent it.

Reddit is widely considered to be the best example of sender supremacy. Either your viewpoints must entirely align with that of the sender, or you are cast off as an unknowledgeable internet troll and promptly downvoted to oblivion.
by thewordcreatorpro January 6, 2021
Someone who is unable to fully send because they are a pussy
Back away from that nigga Jerry thats Chilly he's a half sender unlike us chads who are always on full send
by horny corny 3305 April 26, 2019