Clown it is kinda of like "fuck it", except you can use it for more references. It means that you're gonna clown your girl, Or you're gonna clown it (you're gonna do whatever the fuck you want)

Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.