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noun VERB + HUNCH have I had a hunch that she was not telling the truth. | act on, follow, play Acting on a hunch, I waited outside her house to see if she went out. I decided to follow my hunch and come and see you. | back, confirm They now have a database of information to back their hunches about customers' preferences. PREP. on a ~ I phoned on a hunch to ask if they had any work for me.
Oxford Collocations Dictionary