Gathapper Share definition Flag A Gathapper is an Afrikaans term for a backbiter.Literally translated: 'Arse-biter'. I thought I could trust my co-worker, but she turned out to be a gathapper. Gathapper by BoerSlangMan November 28, 2022 0 0 Get merch Get the Gathapper mug. Buy Now — $32.95 See more merch