From Longman Dictionary of Contemporary Englishsnogsnog /snɒɡ $ snɑːɡ/ verb (snogged, snogging) [intransitive, transitive] British English informalKISS if two people snog, they kiss each other, especially for a long time I saw them snogging in the corner. —snog noun [countable usually singular]→ See Verb table
Examples from the Corpus
snog• Who's that guy snogging Fiona?• And Jamie has to snog her!• Frances left the two of them snogging in a dark corner and went back to the dance floor. 