
1) Cuddle and kiss, london-style 2) French, to Brits 3) Hug and kiss, to a brit 4) Kensington kiss 5) Kiss 6) Kiss in Kensington 7) Kiss, to a Brit 8) Kiss, to Brits 9) Make out 10) Make out in a British bar 11) Make out on the mersey 12) Make out, across the pond 13) Make out, at Hogwarts 14) Make out, to a Brit
Found on
https://www.crosswordclues.com/clue/snog

Song Sparrows.
Found on
http://birding-world.com/glossary-birdwatching-slang/

kiss
Found on
http://www.noslang.com/dictionary/s/

Snog is slang for to kiss lengthily, passionately or lustfully.
Found on
http://www.probertencyclopaedia.com/browse/ZSC.HTM

If you are out on the pull you will know you are succeeding if you end up snogging someone of the opposite sex (or same sex for that matter!). It would probably be referred to as making out in American, or serious kissing!
Found on
https://www.encyclo.co.uk/local/22179
No exact match found.