See: Alki Stevens
"Cone-ing" is a new pranking fad in which the pranker records himself ordering an ice cream at a restaurant through the drive-thru, and taking it from the worker by the ice cream, instead of the cone, and driving off before the worker can say anything.
For more examples just google "cone-ing" there have been many "coners," one who participates in cone-ing, that have created videos!
When the worker hands you the ice cream, you don't take it by the cone. You grab the ice cream itself, and quickly drive away.
Mary - She practically threw the thing at him!
2. any act involving an ice-cream cone to confuse or scare the person selling it to you.
Tom: Ok, do it!
Luke: *Buys an ice cream cone, takes it by grabbing the ice cream portion*
"OMG!, I just saw someone grab a cone by the ice-cream and drove off like he was suppose to be eating it like that!"
"oh yeah, its called cone-ing, all the cool people are doing it. Its the new planking"
"What retards. Wanna jack off in the mayonnaise?"