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1.
Yes in a big way.
yupperdoodles, I had a great time at the movies yesterday
by Brittany Yoder June 16, 2003
 
2.
when you agree with something being said or that is occuring or is about to occur.
"Hey you wanna go to a movie tonight?"
"yupperdoodles"
by Sweetster May 26, 2009
 
3.
The FUN way to say "yup".
Can be confused with 'yepperdoodles'
Both words created by A.L.T., VERY early in the century. It is merely getting attention now, but was around since the beginning!
"Allie, do you wanna hang out 2moro after school?"
"Yupperdoodles! Sounds fun"

"Can people say 'yepperdoodles'?"
"Yupperdoodles! But i just like 'yup' better than 'yep' lol"
by The REAL A.L.T. February 20, 2009
 
4.
an awesome way of saying yes
Did you see that amazing horse?

Yupperdoodle, it was on oldenburg!
by izzi rocks November 13, 2007