When you fellate your partner and they are wearing Crocs.
Kevin: "Hey I'm on my way home honey"
Alana: "Excellent, how are the crocs working out?"
Kevin: "Oh I love them, I never want to take them off"
Alana: "When you are back, I'll give you a Crosh"
When you hold out your hand as if feeding a horse, but you pour beer in it for your mate to drink. Typically by way of initiation.
Will: Do you want to join our gang?
Kevin: Sure
Will: Then you have to do a horsebeer