fold like a cheap suit

To offer little resistance; to submit, yield, or give up very easily. (Perhaps an allusion to the tendency of inexpensive suits to crease more easily due to the thinness of their material.) The suspect folded like a cheap suit after some pressure from the prosecution, signing a full confession for the crime. The team's defense started folding like a cheap suit after we got our second touchdown. The senator swore she would fight to get this legislation passed, but as soon as she met the slightest bit of resistance, she folded like a cheap suit.