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1.
A multi purposeful word...used in many cases at VT...only the VT experience will give one the true understanding of the word...founded truly by Brian Brown and Andrew Dinh
"we're ydessin it up!"
by C00LGuYBb October 29, 2003
 
2.
A drunken yes, hence the d. Founded and popularized at Virginia Tech during the 2003-04 academic year.
"Lets do a power hour! YDES!"

"What did we do last night? I don't remember"..."YDES!"
by RRRadidas October 28, 2003