Internet slang and cutesy/playful register. 爪 (paw) replaces 手 (hand) as if you're an animal - common in fandom and online friend-meetups. Compare with the standard 握手 (shake hands).
memory
握 (grasp) + 爪 (paw) = 'grasp paws'. Same construction as 握手 but with cute-animal substitution.
