2. The practice of greedily eating or drinking something, i.e. "getting it down your neck"
"LOL the slapper! How much beer DID she drink, then?"
"Must have had near fifteen. She was necking em like a sailor!!"
Whether it's meant by pleasing somebody or giraffes necking each other to get the female, it's all brutal.
"Don't touch nothing, sit in the car..let's discuss something. Either you necking or I'll see you tomorrow."
"Shawty got the crazy neck, she like Iverson from Georgetown."