gunk 'ums Share definition Flag Noun: When a woman's legs possess so much fat and cellulite that it hangs over her knee. The resulting roll of fat is a gunk 'um. Damn buh, have you seen how fat Brina got lately. She got gunk 'ums now and everything. gunk 'ums by BenZei July 23, 2008 0 0 Get merch Get the gunk 'ums mug. Buy Now — $32.95 See more merch