Definition of ptui in English:
ptui
exclamation
(also ptooey)
North American Representing the sound of a person spitting; (hence) expressing disgust or contempt: ‘Pah!’ ‘Pshaw!’.
Pronunciation
ptui
/p(ə)ˈtuːi/ /ˈtuːi/Origin
1930s. Imitative. Compare pfui, phooey, and also ptish, pshaw, etc.
Are You Learning English? Here Are Our Top English Tips