Gewonson Share definition Flag Abbreviation of the phrase "Go on son", spoken in an exaggerated English midlands accent - Gew on son! A rugby player about to score a try would be encouraged by his fans shouting GEWONSON! Gewonson by Rungspin March 24, 2011 0 0 Get merch Get the Gewonson mug. Buy Now โ $32.95 See more merch