verb: to embrace another in a combined snuggle and cuddle for a relatively long period of time; especially an extended embrace between a human being and his/her animal pet.
Alex, the cat who owns me, and I had a really long snuddle this morning after he came inside from catting around outside.
Spooning could be considered an example of snuddling. Tell it to your lady friend and it'll for sure make her giggle with delight and make her think you're that much more amazing. i.e. "Baby you're so cute i just wanna get all close to you and snuddle you to death!"