dog at the beach
similar to "out of sight, out of mind", but slightly more insulting. Refers to someone who is your best friend/romance when with you, but seems to forget your existence when not in your company. Came from a trip I took to the beach with my dad and our family dog. I asked if the dog remembered going to the beach when he was a puppy. My dad said, "He probably remembers being here before when he's here, but when we go home, he doesn't remember coming to the beach."
Bill is really sweet and attentive when I see him, but he never calls or emails me. He's a total dog at the beach.
Dog on the beach
Code word for "You have a booger hanging out of your nose."
Bro, you have a dog on the beach. Thanks man, that booger would have stayed there all night!
Dog Beach
Dog Beach is a wide-open dog playground for dogs.
Dog Beach (Ocean Beach), San Diego, CA