rimgash Share definition Flag the giant hole left behind when the lining between the vagina and the asshole is torn apart allowing you to shove a bucket in it. shit bra my mate ganga had afat rimgash, he got a whole leg in rimgash by mbeaziedotorg March 4, 2009 0 0 Get merch Get the rimgash mug. Buy Now — $32.95 See more merch