Top definition
An undefinable phase which can pertain to anything in your vast imagination.
You're about as cool as an upside down spider.

I'd rather suck my own poop than eat an upside down spider.

Charles J banged a girl resembling an upside down spider
by Curtis E Bearr January 12, 2009
Get the mug
Get a Upside down spider mug for your friend Callisto.