Top Definition
1. A Preo is a person who asks too many dumb questions. When A preo person starts an explanation, it's always too long and not very coherent. Preo persons usually have long hair and are disliked by most.

2. An imaginary word by two friends from Belgium to make two hours of physics on tuesday a little more bearable.
Sir, what is the bivalent equivalent of a^u²/R(r.mass/at. mass)?
by Anonymous January 25, 2005

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