From Longman Dictionary of Contemporary Englishmake merrymake merryold-fashionedDL to enjoy yourself by drinking, singing, laughing etc Christmas is a time to eat, drink and make merry. → merry
Examples from the Corpus
make merry• It's the elderly Morkan sisters' annual Yuletide fete, where three generations gather each year to make merry.• And Igot drunk, made merry, in this house of sorrow.• My father and I made merry over the Devil and the folly of believing in him as we supposed many did. 