A slang short form for "Feel my Legs" originating in Hawaii. Mostly used by shark attack survivors, women who aged well, and men that shaved for the first time.
"FML girlfriends, its like im still 20!"
"Gnarrly dude... FML? They got radical scars on it."
"Dude FML! Its so soft! Like a newborn baby! No im not being gay im being serious! FML!!!"