When I did bodyguard work, there were times I could find myself in a strange place and have to carry what was handed to me. A few times I was handed a gun, but never was I give a holster to go along with it. So I learned a way to improvise an "IWB" carry with a shoestring. Just tie a shoestring at each end on your belt and make a loop inward just big enough for the gun to slip into. It will actually keep the gun from dropping further down in your pants, but it doesn't keep it from coming up. Better than nothing.
