prong

Etymology

From Middle English pronge, perhaps from Middle Low German prange (“stick, restraining device”), from prangen (“to press, pinch”), from Old Saxon *prangan, from Proto-West Germanic *prangan, from Proto-Germanic *pranganą (“to press”), from Proto-Indo-European *(s)preng- (“to wrap up, constrict”). Akin to Lithuanian springstù (“to choke, become choked or obstructed”), Latvian sprañgât (“cord, constrict”), Ancient Greek σπαργανόω (sparganóō, “to swaddle”), σπάργανον (spárganon, “swaddling cloth”). See also prank, prance, prink.

noun

1. A thin, pointed, projecting part, as of an antler or a fork or similar tool. A tine.
   a pitchfork with four prongs
2. A branch; a fork.
   the two prongs of a river
3. (colloquial) The penis.
   One look at that lifeguard's prong gave me a throbber like a baseball bat — not quite that big, of course, but at least that hard! 1977, John Ironstone, Orphan, page 102
   2008, Andy Zaltzman on The Bugle podcast, episode 34, You Will Know Us By Our Knobbly Fruit. Hang on... That looks like... No, it can't be. Is that my wang!? Micky Paintbrush, have you painted my papal prong on that nudy man!?

verb

1. To pierce or poke with, or as if with, a prong.