philarthic Share definition Flag (adjective) intensely missing someone. This is often out of love, either for love lost or unrequited. "How are you, man?""Dude, I'm hella philarthic. I miss Chelsea so much sometimes it hurts." philarthic by scs55 November 26, 2009 0 0 Get merch Get the philarthic mug. Buy Now — $32.95 See more merch