The term beans can be used as a slang word word for testicles, as they often resemble a pair of large legumes.
In mammals, the "beans" are usually located outside of the main torso. This is to aid in temperature control as core body temp is too warm for successful creation of viable sperm.
It is better for the reproductive chances of mammals for their "beans" to remain cool.
Hence, "cool beans" came to mean "good", or that all is well. Its use then grew, and it is now often used to indicate hearty approval
In mammals, the "beans" are usually located outside of the main torso. This is to aid in temperature control as core body temp is too warm for successful creation of viable sperm.
It is better for the reproductive chances of mammals for their "beans" to remain cool.
Hence, "cool beans" came to mean "good", or that all is well. Its use then grew, and it is now often used to indicate hearty approval
by LowJack79 December 28, 2020
Get the Cool beansmug. 
A slang term originated in the 60s for the words cool, awesome, or legit
Also can be used sarcasm
Cool beans has made it big in pop culture
Also can be used sarcasm
Cool beans has made it big in pop culture
Nick- Wass up homie, I got da greatest news
Lance- what’s it’s bro
Nick- I got my drivers license back
Lance- cool beans bruh
Nick- I know right
Lance- what’s it’s bro
Nick- I got my drivers license back
Lance- cool beans bruh
Nick- I know right
by Oh really??? March 31, 2019
Get the Cool beansmug. To stick your finger in another mans anus, remove sniff and possibly lick, then insert back into your own anus during homosexual acts.
by El Toros May 21, 2021
Get the Cool as beansmug. by I simp for 2D men July 3, 2020
Get the Cool Beansmug.