fat as a beached whale
e.g. John is as fat as a beached whale.
not be the only pebble on the beach
to not be the only person who is important in a situation or in a group
e.g. It's time to learn that she's not the only pebble on the beach!
young woman who frequents beaches
e.g. Kate is a beach bunny and she offered to put lotion on me.
bring sand to the beach
to do something redundant or pointless, usually in the context of bringing something to a location where it's unnecessary
e.g. The company always offer water during the meetings, so I don't know why you bring yur own bottle. You might as well bring sand to the beach!