What is luckless?

When a man commences doggy style on a female partner in a three way only to to be mounted and penetrated from behind by another male.

Danny was excited for his first threesome only to discover, much to his horror, that he had become a luckless dog.

luckless - meme gif

Don't need no luck. Everything done with skill and zero luck! Luckless!

I'm luckless bro. All skills.