The phrase "to share a toilet" means using the same toilet with other people, like family members or roommates, instead of having a toilet for yourself.
Sentences with «to share a toilet»
In some local guest houses the rooms can be small and simple with shared toilet facilities and showers. (tripcentral.ca)
We have private rooms with shared toilet and shower or you can go for the en - suite. (gili-castle.com)
The private hostels, however, are more spacious and modern so a limited number of students share the toilets and bathrooms. (ghanapoliticsonline.com)