A mixed word with giant and ausome put together. Is used to state that something is big and cool, usually a compliment for TVs, cars houses e.c.t
Correct example:
Matt: Look at this 60 inch TV that i bought from best buy yesterday!!!
Todd: Dude, that ginausome!!!
incorrect example:
Matt: Dude, i bought this pill on ebay and look what it did.
Todd: Wow, thats ginausome!!!
Matt: I know right with this I'll get every girl n town!!!!