prop sth up
phrasal verb with prop verb uk/prɒp/ us
to help an organization, system, etc. that is having trouble, often by giving financial help:
The US Federal Reserve adjusted interest rates in January in an attempt to prop up the economy.
prop up the dollar/pound/yen, etc. Should the Central Bank intervene to prop up the ailing euro, or wait for a natural recovery?
The pact was scrapped last October after Thailand and Malaysia quit, saying that it had failed to prop up prices.