Toilet paper (or, usually, toilet roll in the UK) is a soft tissue paper product used to maintain personal hygiene by cleansing after defecation and urination.

Toilet paper, which differs in composition from facial tissue, is designed to deteriorate when wet in order to keep drain pipes clear. [citation needed] Some types of toilet paper are designed to decompose in septic tanks, [citation needed] which some other bathroom and facial tissues do not. Most septic tank manufacturers advise against using paper products that are non-septic tank safe. In different countries, toilet paper is called "loo roll/paper", "toilet roll", "dunny roll/paper", "bog roll" or "bathroom tissue". "Jax roll" (a simplified version of "jacks-roll") is a widely used expression in rural Ireland.