GINGANTUA Share definition Flag A Gingantua or a Ginga is a person who pretends to be part of the LGBT community, usually bisexual, for attention or selfish purposes. "Youre not gay, stop being a gingantua Alfie!" GINGANTUA by J.COWLEY November 5, 2019 0 0 Get merch Get the GINGANTUA mug. Buy Now — $32.95 See more merch