fleagasm Share definition Flag (n)- When Flea from the Red Hot Chili Peppers makes your brain feel musically aroused with his tight bass lines. "Last night 'Around The World' came on the radio and I had a fleagasm!" fleagasm by drumgler January 5, 2014 0 0 Get merch Get the fleagasm mug. Buy Now — $32.95 See more merch