To be in a state of depression. Ones feeling of sadness and/or gloom.
Julie: "Hey Henry, what's wrong? You seem like you are in the dumps today!"

Henry: "I'm just yilked right now. Bree moved today and I'm gonna miss hangin' with her."

Julie: "Yeah, I know what you mean. It's not going to be the same without her being around."
by 2.5lber January 24, 2013
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A yilk is an animal that looks like a tiny fox and is bright yellow. It is easily identified by its Signature scream: "Yiiiilk". Because of its bright yellow color it is easily hunted and nearly extinct despite parts of Patagonia where Yilks still roam free.
by Henn12345 December 04, 2018
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