a 'flimsy' piece of material
a movie with a 'flimsy' plot
a 'flimsy' [='weak'] excuse
(..) MAGGIE: It was. Yeah, I didn't kill anybody today. - You're an excellent doctor. - How do you know? I have a feeling. That's pretty flimsy evidence. Close your eyes. It's just for a moment. SETH: What am I doing? You're touching me. (..)1998 City of Angels