The phrase "damn reason" is used to express frustration or annoyance about something that doesn't have a clear or logical explanation.
Sentences with «damn reason»
As human beings we ALWAYS seem to need a god damn reason for everything. (flickfilosopher.com)
Mario Kart, unless it is a complete overhaul of the whole damn reason MK is MK, will never be F - Zero, just like it will never be DKR. (gonintendo.com)
Reports in Spain claim Manchester United could miss out on a big - name transfer to Chelsea for a particularly damning reason. (caughtoffside.com)