“Pay It Forward” is a phrase that has come into use in our American English language. That phrase is used to mean doing a good deed for someone other than the person who has done something kind for you. That is to say that rather than repaying a good deed or favor to the person who helped you, you help or do a good deed for someone else instead, including doing so for total strangers.
If you recall, I had written about this concept with this specific terminology once before. If you do not recall it along with its helpful links, just click on over now to read:
Pay It Forward from Roland’s Ramblings.