lender of last resort
noun[C]
BANKING,FINANCE,ECONOMICSukusacentralbankorinternationalorganizationthatlendsmoneytobanksorcountriesindifficultfinancialperiodswhen they cannotborrowfromanywhereelse:
TheIMFisknownas thelenderof lastresorttocountriesinfinancialtrouble.