notklkl Share definition Flag Not Cool. Letting someone know that what they just said/did wasn't cool. Also used as a emoticon on msn. Marcus:"I just set your house on fire, baby!" Cornelious:"Dude, notklkl." notklkl by Cody Hauri July 7, 2007 0 0 Get merch Get the notklkl mug. Buy Now — $32.95 See more merch
