Geo-shank 

to shank someone with a metal geometry compass(preferebly rusty).

Holy shit that crazy J-wale geo-shanked Frank
(for reference you can search J-wale)

Geo-shank by J-WALE June 16, 2009

Geoshank 

To shank someone with a geometry compass

After years of threats, the disgruntled child finally geoshanked his teacher

Geoshank by Pitking4975 July 1, 2009