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Yaldo is a positive exclamation when something goes well.
usually used by good looking scotsmen, not many people are aware of the importance of the term and those that use it have the duty to feel empowered. If Barney Stinson was Scottish he would most definitely say "Yaldo" on a regular basis. The word is most effective when combined with the terms "boss" or "dope".

Yaldo is AWESOME.
"I scored a goal, YALDO"

"I have a good lunch, YALDO"

"Scotland beat England at the rugby! YALDO"
by JeremyClarksonForPresident. March 20, 2012
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