Snog

[Tina]

verb; to interface passionately with another being, creating a field of physical obsession and focused arousal centered on the lips, mouth and tongue.

verb; to play tonsil hockey

verb; to give comfort or show affection to a fellow user of an internet forum. (syn: /lick, /spamHug)

[PussyCat]

British childrens and young adults slang for Kissing. It also describes a lusty wild kiss...

[Donald Trump]

A term to describe heavy kissing like a french kiss.

[Mark Zuckerberg]

verb; making out passionately

[Couch Potatoe]

To kiss with an open mouth. [French kiss]. [Toungie].

[Tina]

v- Making out, but British (to snog, snogging snogged)
n- Vegan eggnog made with soy milk and without eggs

[Rihanna]

To make out heavily.

[Tanya Shivari]

Literally, to kiss (British slang).
Often includes activities that would be included in making out, e.g., necking.
One wag defined it as anything you can do with a married woman in her husbands presence. (This assumes a monogamous marriage rather than an open one.)

[Britney]

The English term 4 kissing

[Michiko]

Kiss and caress amorously.