Lionwhale is a term used for people who catfish. Catfish is a slang term used to describe people whom used fake social network accounts in an attempt to gain the trust of another individual. They might use it to get info by pretending to be a hot girl or hot guy. Lionwhale is playing off of the word catfish, the cat is substituted for a bigger cat, a lion, while the fish is substituted for a bigger marine animal, a whale. Essential a lionwhale is a very experienced catfish.