Why do they call a Garrison Cover a piss Cutter?

The term "piss cutter" is a slang nickname for a garrison cover, which is a type of military hat or cap. The name likely derives from the hat's flat, wide brim, resembling a "cut" that might help divert or "cut" the flow of rain or other elements, though the exact origins are somewhat unclear and vary by interpretation. Additionally, the term may reflect the hat's association with lower morale or less formal settings, as "piss" often connotes something undesirable. Over time, such colloquial terms can evolve and adopt various meanings within military culture.