Definition of yowza in US English:

yowza

(also yowsah, yowzah, yowsa)

exclamation

US
informal
  • Used to express approval, excitement, or enthusiasm.

    ‘yowza, that was some exciting basketball weekend’
    ‘a compact flatbed scanner for a mere $20, yowza!’
    ‘Yowzah! These results are incredible’
    • ‘I'm also surprised that CBS put that on at 7:30, yowza.’
    • ‘Yowza, that is quite a list.’
    • ‘Then you get out on the open road and really step on the gas and Yowzah!’
    • ‘Yowsa, this was one of the most delicious and flavorful dinners we have had in a while.’
    • ‘With exclusive offers from local retailers, Yowza!’

Origin

1930s (as yowzah): perhaps representing a regional or colloquial pronunciation of yes sir.

Pronunciation

yowza

/ˈjaʊzə//ˈyouzə/