flimsy (http://definr.com/flimsy)

     adj 1: lacking solidity or strength; "a flimsy table"; "flimsy
            construction"; "a fragile link with the past" [syn: fragile]
     2: having little substance or significance; "a flimsy excuse";
        "slight evidence"; "a tenuous argument"; "a thin plot"
        [syn: slight, tenuous, thin]
     3: very thin and insubstantial; "thin paper"; "flimsy voile";
        "light summer dresses" [syn: light]
     4: resembling cardboard especially in flimsiness; "apartments
        with cardboard walls" [syn: cardboard]
     n : a thin strong light-weight translucent paper used especially
         for making carbon copies [syn: onionskin]