back to back
adjective or adverb(back-to-back)
facing in opposite directions and often touching
back to back
adjective or adverb(back-to-back)
coming one after the other : consecutive
back to back
noun(back-to-back)
a house that is connected in a row with other houses on each side and with a similar row of houses behind it
back to back
noun(back-to-back)
a sequence of two games scheduled to be played on consecutive days