ssoyp
It means "Send selfie of yourself please", so you can send that to anyone you like or want a selfie from. Unlikely that it will work but it's better than just asking to send a selfie, because the person will question what "Ssoyp" means.
Hey, ssoyp?
Person: What does that mean?
Can you 'send selfie of yourself please' because you're pretty?
Person: sure! (picture)
Person: What does that mean?
Can you 'send selfie of yourself please' because you're pretty?
Person: sure! (picture)