to blow someone off; to be a dick and not respond to someone when they desire to talk.

lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin

To not look at or pay attention to

when you're talking to someone and they take out his/her iphone and ignore you.

refuse to take notice of or acknowledge; disregard intentionally.

The most simple and effective way to let somebody know you meant to not talk to them, call on their birthday, acknowledge them in public or admit to yourself you know them. To go against the grain of all the people who contribute to their sphere of attention and attention seeking and their self image of a good, upstanding person or whatever the fuck their concern is with the public eye watching.