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A person (usually used to describe a female) who is of legal adult age for sexual intercourse (over 18 in most US states), but is still too young to legally drink alcoholic beverages (ie, under the age of 21). "Too Young to Drink, Old Enough to Fuck" = Tydoef
I've been taking night classes at the junior college so I can pick up a Tydoef.

I fucked a Tydoef from my accounting class, but I had to take her home before I went out to the bars to drink.
by HorseHungTydoefFucker October 17, 2007
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