When two men hang out constantly and refuse to admit their longing to have the others genitals in their mouths. So basically, it's the manlier version of a "bromance."

when you're hungover as shit after a spending a night drunk as a skunk

The term used when a female has a male best friend or friends.

Besties with testes is a non profit orginazation for testicular Cancer awareness. Based out of denver colorado, and expanded to Phoenix Arizona Besties with testes brings Cancer awareness in a fun way Uncle Sam wants YOU to touch your self. Check your nuts early detection saves lives. 1 in 5 men aged 15-35+ will be diagnosed with testicular Cancer if caught early enough if is curable.