To ignore, not pay attention, to diss. One can be shanked via eye contact, phone call, meeting, etc. Say your walking down the hallway in school and up ahead is your buddy who you really don't want to talk to. As he approaches, you keep looking straight ahead and ignore him. That kid just got shanked hardcore. You can also verbally shank by ignoring any question thats asked.
1. Bob recieves a phone call from his girlfiend Melissa. He is out with his boys drinking. He hits the ignore button on his phone... That bitch just got shanked!
Shanking possibilities are unlimited!!