What does «ujú» mean in Spanish?

Exclamation of distrust, doubt or irony and, depending on intonation and context, can also be emphasis.

♦ Used in: Dominican Republic - Puerto Rico - Venezuela

Examples of use in Spanish: "-¿Crees en la honestidad de los políticos? // -Ujú..."
Interjection used to express approval of what another person is saying or affirming. Similar to the interjection "ajá".

♦ Used in: Cuba - Dominican Republic - Nicaragua - Puerto Rico - Venezuela

Examples of use in Spanish: "México primer lugar -¡Ujú!... en obesidad -¡Ah!".

"–Ujú –contesté con sorna cómplice".

"-¿Has entendido lo que dije? // -¡ujú!"
Interjection used to express joy and astonishment.

♦ Used in: Honduras - Puerto Rico - Salvador