If you receive or give a Kev Ban, you or that person is not allowed to use a vape. A person is kev banned for violating the unspoken rules of keving for example: taking too many tokes, making the drip tip wet, being an intolerable person or refusing to give the vape back. If you use a vape other than your own during a kev ban you can be rightfully shanked on site!
For example:
"You've been kev banned!"
Another example:
*constantly asking to use your vape
"You have been kev banned"