Relier Pairs IDIOMS. AGEVersion en ligne IDIOMS. AGE par María Marteles 1 long in the tooth 2 to be knee-high to a grasshopper 3 get on in years 4 silver surfer 5 (be) over the hill 6 to act your age 7 mutton dressed as a lamb 8 rob the cradle 9 (live to a) ripe old age 10 feel your age Realize that you are no longer young Too old to do something Reach an age when you can no longer perform as well as before. Very young or small child Have a romantic relationship with someone who is much younger than yourself. no to behave as someone younger To live until you are very old. Someone who is growing old. An elderly person who uses the internet a person who tries to look younger by wearing clothes designed for younger people