A whale with bisexual tendencies or just a cooler way to say bisexual.
Me: sup man I heard you're a bisexuwhale.
Jim: yeah man!
Or
Zoo keeper: omg amira get off ... you're such a bisexuwhale
Amira the whale: *whistles in bisexuwhale*
When you have an interest in the same gender, the opposite gender, and whales.
"What's your sexuality?"
"I'm bisexuwhale!"