Yupcourse 

A friendly and colloquial version of the much more stodgy "Yes, of course"

Did you understand all the blah, blah, blah jargon at the seminar? Yupcourse!

Yupcourse by FC Soccer Coach D July 26, 2012

Yuvcourse 

Contraction of "Yes, of course" but with an added emphasis, yes, of course, what am I stupid?" Sometimes spelt "Y'ofcourse."

Senator Kerrey: Mr Tenet, did you realize the Agency computer system was not suited to the task at hand?

DCI Tenet: Yuvcourse.

Yuvcourse by Didymus Hylobates April 16, 2004

Yahcourse 

A conjunction of the words 'yeah' and 'course'. Used when the two words are supposed to follow each other in quick succession in a sentence, and end up blending in with one another.

Person 1: Hey, you going to Paul's birthday party?
Person 2: Yahcourse!

Yahcourse by P1mp-My-Giraffe February 28, 2011