cactus nugget Share definition Flag When you eat swordfish and shit it out in spiky poop nuggets. It is rather painful. Damn. I went to that one seafood restaurant last night and its safe to say I had some pretty gnarly cactus nuggets this morning. cactus nugget by The Russians June 21, 2011 0 0 Get merch Get the cactus nugget mug. Buy Now — $32.95 See more merch