1.
If something comes ~, it becomes separated from the thing that it was attached to.
The brown vinyl covering all the horizontal surfaces is coming ~ in several places.
PHRASE: V inflects
2.
To come ~ means to fail. (mainly BRIT INFORMAL; in AM, usually use come unglued )
Where economics comes ~ is when it doesn’t take account of the anticipated actions of human beings...
= fail
PHRASE: V inflects
see also unstick