Exclamation of something being great or amazing. Very common for Malaysians. It's unknown if this is an amalgamation of a malay word fulamak, and the tamil word aiyoyo. Or if its from the chinese word 富有 fùyǒu, which means rich/abudant/wealthy + to have/there is/to be
A malaysian slang for WOW or OMG
Fuyoh the clothes in that shop have huge discounts