A person who doesn't take anyones shit and just does as he/she pleases no matter the circumstances or the outcome.

The act of having sender skates slap some beautiful imagery on your skateboard deck

a nigga who denies a good time or is just straight pussy.

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-

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.

Someone who is unable to fully send because they are a pussy

Someone who does not commit to a full send for the boys and are generally pussies when it comes to some savage shit.

There is no try, only do. - kipper

We all know, or at least heard of that kid whose name is "Sender". Some say it comes from the Yiddish word Saunder which means "People's Protector", and others say the name is just short for Alexander. Either-way, every Sender you know of, or you heard of is uniquely creative in some way, shape or form. It's just their natural 'Sender' way of life. A 'Sender' is usually LOVED by all the girls, however disliked by jealous bastards who envy his creativeness and accomplishments. There is no in between of liking him or not. And at the end of the day, if you know a kid named Sender, you want to know him for the rest of your life, because for some reason we all know he'll do something extraordinary in his career. (You're also probably Jewish if you know a Sender.)