A Dirty JB is whenever you enter a mans penis with your penis, this will usually occurs at lil nas x concerts and is also performed whenever a woman has a strap on.
Bill: Hey mulligan i just was at a wicked lil nas c concert and this big bulky black man came up to me and gave me a Dirty JB
by Dirty JB December 02, 2021
The opposite of a BJ. It is when a person from either sex gives a blowjob but blows the penis up like a balloon instead of sucking
by Jebhosbejdnfbdjfbj December 02, 2021