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2.
It's the oo-S-of ah!

Saying 'United States of America' or reding the letters 'U, S, A' takes too long. Some pronounce as 'Yoosah'.
Transliterate!
"I live in the Oosah!"

(Nationality)
"Oosanian, Oosaian"
by Solomon March 14, 2005
 
1.
One who is extremely hot
oi, oosah at 2 o'clock

insert name here is an oosah
by Brit January 10, 2005