The meaning behind the phrase, “selling like hotcakes” seems obvious but it might be too old to be using. A new study looked at old sayings that are going extinct. Over half of people under 50 would never say, “flash in the pan” and 49% would never say “selling like hot cakes” either.

Here are a few more old sayings that are going extinct.

1.  A flash in the pan

2.  Dead as a doornail

3.  Beating a dead horse

4.  Toe the line

5.  Drop someone a line

6.  Steal my thunder

7.  Be there, or be square

8.  Put a sock in it

9.  Cool as a cucumber

10.  Raining cats and dogs.