Hiking the Apps Share definition Flag To have an extramarital affair.See South Carolina Gov. Mark Sanford. Bob: Oh shit, Mike's "Hiking the Apps" with Judy. Jim: Damn! Will: Go Mikey! Hiking the Apps by Puddyfudge June 30, 2009 0 0 Get merch Get the Hiking the Apps mug. Buy Now — $32.95 See more merch