It's a phrase one says when they aren't really kidding but instead use this to take off some of the "truth hurts" pain. While people are laughing because you said sike, you throw in..."But forreal though.."
Jim: Dude your girlfriend is pretty ugly
Mike: What ?
Jim: Sike, naw...but forreal though...she's pretty ugly
by BeStealthy May 7, 2011
Get the Sike, naw...but forreal though mug.