Flu Jab
Sneezing whilst climaxing during masturbation, making a climax and 1/7th.
"Dude, when I blew my load the other day sneezed at the same time. Thought my eyeballs were going to pop out at the intensity of the flu jab."
Flu Jab
When a man has sex with a woman with the intent of getting an STD to transfer to another woman, most often one who has been cheating on him previously.
"Shaniqua was fucking Daquan so I'm gonna give her a flu jab, where's that bitch with Syphilis?"