(DRINKS) [noun] [C] [UK and ANZ] [informal] - (a turn to buy) a set of drinks for a group of people"Would you like another drink?" "Yes I would, but you bought the last ones, so it's my shout."Who's going to get the next shout?
SHOUT
Meaning of SHOUT in English
Cambridge English vocab. Кембриджский английский словарь. 2012