A Joker Blue is the act of a woman taking your penis so deep and for so long on onesingle suck that her face becomes blue from not being able to breathe. If done properly, the womans make-up, most importantly her lipstick still remains in tact.
"Hey girl, is it true the more make-up costs, the longer it lasts?"
"Hell nah girl, the secret is Joker Blue...that lipstick so spensive it got me giving Joker Blue all dizzay!"