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.
Boomer: do yuo like the 1911??/? IT won 2 worl wards shooting God's own caliber!
Normal Person: It's a decent weapon.
Boomer: AW HE'LL YEAH BORTHER!
Normal Person: It's a decent weapon.
Boomer: AW HE'LL YEAH BORTHER!
by Dr. Fudd's Boomer Repellent July 18, 2019
Get the Borthermug. A man that surpasses the title of brother, a man who is so lordly that a word must be made to describe him.
by Nerdmeister August 4, 2016
Get the Borthermug. by BIGGGDaddyDoss October 22, 2018
Get the Borthermug. Your my borther
by Jilly bones January 8, 2019
Get the Borthermug. Stalker: -creeeeeepin'- 'ooh, there's Lisa!'
Lisa: 'You best be 5 meters away before I get out my borther!'
Lisa: 'You best be 5 meters away before I get out my borther!'
by jhqbgejkgnjkwenbg1234 March 15, 2011
Get the Borthermug. by Gays can’t read March 7, 2019
Get the Borthermug. Heck yeah borther: a phrase that started on YouTube, under the gaming channels Kryoz and SMii7Y. It’s more common on Kryoz’ channel, but is still often prevalent on SMii7Y’s, as well. It’s spoken in a southern accent, a simple mispronunciation of “heck yeah brother.” This phrase is a definite fan favorite.
by _kkriii March 16, 2018
Get the heck yeah, borthermug.