underplumbed
(Adjective) describes a building or venue with inadequate plumbing or restroom facilities
(Verb: underplumb) To design or construct a building with inadequate restroom facilities or plumbing
(Verb: underplumb) To design or construct a building with inadequate restroom facilities or plumbing
(adjective) I’ve been waiting in line 30 minutes to use the toilet—this place is seriously underplumbed. (Verb) I have four teenagers, so don’t underplumb our new house with only one bathroom upstairs.