Nosengeyser Share definition Flag The act of spewing matter not belonging in the nose, From out of ones nose. "When I mentioned that time I boinked a walrus, he really let lose with a nosengeyser that went like four feet!" Nosengeyser by Todd Gibbs October 13, 2006 0 0 Get merch Get the Nosengeyser mug. Buy Now — $32.95 See more merch