Seattle Strongarm Share definition Flag The act of simultaneously, or consecutively, defecating and masturbating in a coffee shop restroom I was all pent up on my road trip until I stopped off at a Starbucks and gave myself a Seattle Strongarm. Seattle Strongarm by Surrealyo September 3, 2012 0 0 Get merch Get the Seattle Strongarm mug. Buy Now — $32.95 See more merch