Shiboomski Share definition Flag Slang used by teachers to congratulate their students on answering a problem or question successfully. Teacher: What is 2+2? Student: Four Teacher: *yells* SHIBOOMSKI!!! Shiboomski by Voidoracle October 7, 2012 0 0 Get merch Get the Shiboomski mug. Buy Now — $32.95 See more merch