How To Pronounce Yay

In British English, yay is pronounced /jeɪ/. The narrow phonetic transcription is [jeɪ]. In American English, it is pronounced /jeɪ/.

Yay has one syllable. British and American speakers say it the same way.

Slashes / / show the phonemic transcription, the sounds that change meaning. Square brackets [ ] show the phonetic transcription, with the finer detail of how the sounds are actually made.