Twiggus Share definition Flag A name you give to a dude that's so skinny, you can count his ribs through his shirt. Guy1: Hey, that gumpy ass dude is so skinny. Guy2: Haha, he's a complete Twiggus. Twiggus by Geegoodie October 7, 2009 0 0 Get merch Get the Twiggus mug. Buy Now — $32.95 See more merch