From Longman Dictionary of Contemporary Englishmashmash1 /mæʃ/ (also mash up) verb [transitive] SQUASHto crush something, especially a food that has been cooked, until it is soft and smooth Mash the bananas. —masher noun [countable] a potato masher→ See Verb table
Examples from the Corpus
mash• I take the hand that he mashed in greeting me, and work the knuckles with the fingers of my other hand.• Continue stirring and mashing potatoes for about 5 minutes, or until the water is absorbed and potatoes are soft and lumpy.• The other boy will mash tea a dozen times a day - your house becomes a transport cafe.• Mash the banana and add it to the batter.• Mash the bananas and add them to the mixture.• Drain then mash them and leave to cool for 5 minutes.• Boil the potatoes and then mash them up.• Steam or bake winter squash of your choice, then mash with butter and serve as a colorful alternative to mashed potatoes.mashmash2 noun [uncountable] 1 British English informalDFF potatoes that have been boiled and then crushed and mixed with milk until they are smooth bangers (=sausages) and mash2 DFDa mixture of malt or crushed grain and hot water, used to make beer or whisky3 TAHBAa mixture of grain cooked with water to make a food for animalsExamples from the Corpus
mash• In fact, the collapse of the bud to a mash is a consequence of the egg laying.• Above: Bangers and mash - savoury and satisfying.• Bangers and mash is said to be the thing many newly converted vegetarians miss, but now they need pine no longer.• Tony Curtis wanted sausages, beans and mash and so he queued up with everyone else.M.A.S.HM.A.S.H /mæʃ/ a very popular US television programme(1972–82), based on Robert Altman’s film of the same name (1970) about a US army medical camp during the Korean War. Although it treated the subject in a humorous way, it also showed the serious effects that war had on people. The letters stand for ‘Mobile Army Surgical Hospital’.Origin mash2 Old English max 