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n., Excitement, usually Sexual or romantic, causing a hard on of the pecker and/or clit and nipples, but it may occur with other forms of thrill-seeking, such as extreme sports, extreme amusement park rides, or space monkey.

The occurrence of tit as the first syllable of titillation is purely coincidental.

v. form, titillate.
The road between Merced Falls and Hornitos, where it passes around the buttes, has such perfect hills for a roller coaster ride that little kids get titillation riding in a car driving on it.
by Downstrike December 24, 2005
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2
Vibration of the mammaries, usually during jogging or physical activity.
Yo, did you see that when she jogged by? That was some serious titillation goin' on!
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