Is
Boomerang Conversion
the name you were thinking of?
Explanation: There was a joke going around a few years ago that you could string together any two words starting with B and C and everyone would know you meant a certain British actor whose initials were BC.
I don't know that this is true, but I wanted to refresh my Javascript skills, and this seemed like a fun idea to play with. (Refresh the page to see a new word combination.)
Credit: site created by Nate Hoffelder