Originally, it was a somewhat common mispelling of the word "brother", often by baby boomers, people attempting to imitate Hulk Hogan, and Fudds. It's now used often to troll people, and is used as a mild joke when shitting on boomers in gun communities, and biker communities. It's also especially popular on /k/, other boards of 4chan, when adding complete silliness to a post.

A person who doesn't realize they are transgender yet, or is in denial; an undeveloped transgender person. When they realize, it's referred to as the "egg cracking."

A man that surpasses the title of brother, a man who is so lordly that a word must be made to describe him.

Borther - a brother cousin, or other incestuous male relatives.

Borther is a word that can mean many thing but is often used to refer to friends and relatives

Something you sick on a tall, creepy man who is stalking you.

Like a brother but some stupid little shit couldn’t pronounce it right