Sixty-nine Definition

sĭkstē-nīn
noun
A sexual activity involving two individuals and consisting of simultaneous oral stimulation of the genitals.
Webster's New World
Oral-genital sex between two people at the same time.
American Heritage

The cardinal number following sixty-eight and preceding seventy.

Wiktionary
Synonyms:
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verb
To have sex in the sixty-nine position.
Wiktionary
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Origin of Sixty-nine

  • From the rotational symmetry of the numeral 69 - if rotated a half-turn (by 180°), the numeral remains the same, and a couple both giving oral sex at once have, in principle, a similar rotational symmetry.

    From Wiktionary

  • From the resemblance of the figure 69 to the position assumed by the two people

    From American Heritage Dictionary of the English Language, 5th Edition

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