Single Girl Toilet
A toilet that is extremely small lengthwise. Referred to as a single girl toilet because if any normal-sized man uses it, their penis will uncomfortably touch the toilet seat/bowl.
Man #1: "My Aunt finished building her own house a few days ago, but she bought one of those tiny rounded toilets to go in the bathroom."
Man #2: "Ah, the classic Single Girl Toilet."
Man #2: "Ah, the classic Single Girl Toilet."