A Locked Slut
A locked slut is someone who’s stuck with one person and will do anything, even the most humiliating and ridiculous things, just to keep them happy.
She’s a locked slut. She let her boyfriend wear a chicken suit to a party and called it a fashion statement.
He’s a locked slut. He let his girlfriend throw confetti in his mouth at a wedding.
That girl is a locked slut. She danced in a chicken suit for her boyfriend just to make him laugh.