YDT/UDT means Your Dads Tits .
For Example Zaheer-' Your Trims Deffo Not From Dudley Road , Better Cutz' Zain - ' Your Dads Tits YDT/UDT
UDT syndrome is called "Uncontrollable Double-Tap" syndrome. You can know if you are experiencing this syndrome if you double-tap almost everything on Instagram. However, this definition applies more to people who accidentally like someone's 64 weeks old picture.
Person: "Why are you liking all the pics?"
Person 2: "uhjj ever heard of UDT syndrome?!"
Or
Person A: "I liked my ex-boyfriend's photo from 128 weeks ago!!!"
Someone who spends countless hours trolling urbandictionary.com, memorizing a plethora of phrases and spends an inordinate amount of time plotting how to casually slip them into daily conversation while claiming all the credit
Kyle: Damn its a march of dimes in here homes!
Phil to Scott: Man that Kyle is such a UDT (Urban Dictionary Tool).
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