One's exact opposite, created by someone's parents to torture him/her until death.

A combination of a best friend and a punching bag

A sibling is a dirty asswipe that gains its energy off making your life a hellhole. Your luck is especially unfortunate when you have multiple siblings within a small/medium average age gap
Siblings are there to 1) test your patience 2) ruin your life and 3) make you want to jump out your window, needless to say they also make you want to punch them in the face when you want to take a shower so they run in there first and lock the door when they weren't thinking about but only run in there because you say it.

You know when your family has lost the egg and sperm lottery when your siblings even go to the extent of counting out food so you both have the same exact amount.

The less commonly used term for brothers or sisters.

They are often identified with a loud voice and tattletale incidents. Pinching is their main defensive action.

Siblings are often called annoying by their older and smarter siblings.

A child born of your mother's womb who is used as a unit of comparison in the family.

Hell in a human form. Unfortunately, they related to you.

Siblings are people who you might always be mad at or you might love them all the time ( rarely ). They are related to you because you have the same person who gave birth to you or adopted. They can be horrible to each other and they can hate each other..that's fine.