frothing Share definition Flag To be fully amped. Is the more formal use of the word frothen (pronounced froth'n). Its origins is the yalls(yallingup) area of WA (western Australia) in the surfing community. mate its solid 4 ft, pitting off its tit, im frothing for it. frothing by 3ftbearss May 3, 2007 0 0 Get merch Get the frothing mug. Buy Now — $32.95 See more merch