From Longman Dictionary of Contemporary Englishmistermis‧ter /ˈmɪstə $ -ər/ ●○○ noun 1 → Mister2 spoken especially American EnglishNAME OF A PERSON used to address a man whose name you do not know Thanks, mister.
Examples from the Corpus
mister• This is no joke, mister, it's for real.• Hand down please, mister Grant.• Let me tell you something, mister.• You don't have any change, do you mister?MisterMisterMANthe full form of Mr ► In people’s names, Mister is always written Mr. → misterFrom Longman Business DictionaryMisterMis‧ter /ˈmɪstə-ər/ noun the full form of MROrigin mister (1500-1600) master 