Top Definition
A rare sight in the modern world. Usually found in packs.

Most Theuni (pl. of Theunis) are emotionless and rather unexpressive. Thus, any expression of feeling (e.g. smiling, crying, laughter) is a rarity, and should be photographed for future scientific research. Most people usually just use their iPhone
Dude, there goes that Theunis. He never smiles, you know. I think he might be a robot.
by Arimotamo November 09, 2013
1 more definition
The ideal subject to stalk. A Theunis forgets who you are after meeting, making this subject the perfect person to stalk and keep tabs on. You know all about him, but he is clueless of up you.

The perfect stalking scenario. Good for practicing on harder subjects.
"Hey does he even know who you are?"
"He's a Theunis, I know him, but he doesn't know me."
by BatVader November 09, 2013

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