sershiggitty Share definition Flag (used to express affirmation or assent or to mark the addition of something emphasizing and amplifying a previous statement) Boy #1: "Do you want cheese on your pizza?" Boy #2: "Sershiggitty." sershiggitty by SirCaliente January 21, 2010 0 0 Get merch Get the sershiggitty mug. Buy Now — $32.95 See more merch