Verb. The act of a cum hungry slut opening her mouth like a baby-bird and waiting for her partner to shoot a huge load of his spunk into her mouth. The position of her mouth is similar to a baby-bird waiting for it's parent to dump regurgitated food into it's mouth.
He loves to finish off by having her baby-bird his cock while he jacks off.
Look at that baby-bird...what a cum slut just waiting for him to unload in her mouth.