Me: Hey, do you live in the ocean?
Random guy: Why?
Me: Because you look like a whale.
Me: Hey, do you live in the ocean?
Random guy: Why?
Me: Because you look like a whale.
Alright listen up, buttercup. This joke is a simple roast. The dude is calling the random guy fat by comparing him to a whale, which lives in the ocean and is HUGE. I bet you think Orcas perform at Sea World for free, don't you?