Context: The informant is a 23-year-old white female from Florida who grew up with her parents and two older siblings. When the informant was in grade school, a common accusation between kids swinging on adjacent swings, when someone got too close to them, was, “You’re in my shower!”
Analysis: The informant says she remembers the phrase because “I thought it was a weird thing to say, i was like, okay, whatever you say…” This indicates that it was not a widespread saying but perhaps unique to a small area of schools or perhaps even just the one school that the informant attended.
It can be assumed that when someone had possession of a swing, they would be unwilling to give it up or to experience interference from other swingers. The connotation of a shower being a very individual, private space, therefore, transferred onto the swinger’s small area of free movement and they would understandably be indignant of someone invading their “private,” designated area.