back-to-back
ˌback-to-ˈback1 
adjective [only before noun]
happening one after another:
They have had five back-to-back wins.
back-to-back2
noun [countable] British English
a house in a row or terrace built with its back touching the back of the next row of houses
| I |
adjective [only before noun]happening one after another:
| II |
noun [countable] British Englisha house in a row or terrace built with its back touching the back of the next row of houses