YIKR Share definition Flag Acronym for "yeah, I know, right?" which can be used after basically anything. The acronym is only used in text or AIM conversations. Julia: Did you hear how Brad got all shit faced last night? Zane: YIKR (Yeah I know right)? YIKR by Yosh7 February 2, 2009 0 0 Get merch Get the YIKR mug. Buy Now — $32.95 See more merch