on–again, off–again adjective
chiefly US : happening or existing at some times and not at other times
▪ on-again, off-again fads ▪ She has been his on-again, off-again girlfriend for the past several years. [=she has been his girlfriend at certain times and not been his girlfriend at other times during the past several years]
▪ on-again, off-again fads ▪ She has been his on-again, off-again girlfriend for the past several years. [=she has been his girlfriend at certain times and not been his girlfriend at other times during the past several years]
