Sandicapped

The act or situation of dumping your girlfriend to only want her back weeks later, but only to realize she has moved on to another man. Causing a feeling of depression and humiliation as you beg for her to come back.

A sandicap is a sandbaggers handicap. In golf, one plays to their specific handicap, which allows them x shots per round. However, some take advantage of this and claim they are worse than they actually are in order to gain more strokes. This type of person would be known as a sandicapper.