A versatile tapeless drywall system comprising a drywall board panel having a generally rectangular shape formed of paper-wrapped core material and having front and back faces spaced apart to define a thickness of the panel and having long and short edges, said edges being characterized by one of the long edges being tapered on the front face marginal portions thereof enabling pairs of boards of such construction to be secured with the front faces exposed and with one long edge of each being abutted together to form a recess along the joint line of the abutted edges suitable for receiving finishing material therein and with the opposite long edge having a flap extending from the front face and beyond the edge and along the length of the long edge whereby the flap can be rotated about the axis of the front edge of the panel from a position against the face of the panel, for stacking and shipping the panel, through an arc of about 270.degree. so that when the panels are in abutting relationship, the flap can be rotated into contact with and affixed to an abutting panel to thereby join adjacent panels.