necking

noun4

1. •
   (slang) Making out; kissing profusely, especially on the neck.

   • However one of the girls in answer to our questions explained that at the end of the ceremony the men and women participants are quite free to pair off for what she called “necking”. — 1965
2. •
   A behavior among male giraffes where they hold combat for social dominance using their necks as weapons.

   • Necking helps young male giraffes test which one has a stronger neck. — 2005
3. •
   (slang) Chugging beer.

   • For Lent, he gave up necking and cigarettes.
4. •
   A neckmould.