(to be) out-of-d...........
(to be) out-of-date
(to be) m................-of-the-road
(to be) middle-of-the-road
be in good s..........
be in good shape
be on your/its last l.........
be on your/its last legs
(to) gather d............
(to) gather dust
get the h........... of something
get the hang of something
not break the b...........
not break the bank
on the b..........
on the blink/fritz
cost an a.... and a l.......
cost an arm and a leg
c...............'s play
child's play
to be u...........-friendly
user-friendly
to be) all the r.........
to be) all the rage
(to be) old h......
(to be) old hat
the c......... of the c........
the cream of the crop
(to) come in h.........
(to) come in handy