skeevynasty Share definition Flag skeevy; nasty. Anything that you think is beyond just one of those words, causing it to become a combined effort which dramatizes the entire thing. Hobo: yur hot. Girl (to friend): EWW THAT WAS SOO SKEEVYNASTY!!! skeevynasty by Yasemin & Rachel December 30, 2008 Get the skeevynasty mug.