Hippo lips Share definition Flag A person with a mouth wide enough to fit 20 or more hot dogs. Dang Hillory you can fit 20 slammers in them hippo lips. Hippo lips by Gjaanfgkdhlsdyuiebfisdk October 21, 2017 0 0 Get merch Get the Hippo lips mug. Buy Now — $32.95 See more merch