sixty-nine

Definition

sixty-nine rate

(Adult / Slang)

1. Or: sixty-nine position / 69 position , a position for mutual oral-genital sex (cunnilingus or fellatio) wherein two lovers arrange themselves in opposite directions, head to tail, belly to belly, side by side or one lover above the other. This position is used by heterosexual and homosexual couples for reciprocal oral and manual stimulation; it can be engaged in by two men who perform fellatio, two women who perform cunnilingus, or by woman and a man one performing fellatio and the other cunnilingus. The performance of the act may be referred to as 69ing or sixty-nining while the aftermath is 69d.
Etymology: Based on the similarity of the inverted positions of the partners with the numerals 6 and 9 joined together into 69; the circles representing the heads and the ends of the digits the feet.

2. To perform mutual oral sex in that position.
Synonyms: 6-2-9; 6 to 9; double header; double wedding; flip-flop; flying sixty-nine; fork and spoon; (go) halvsies; head over heels (in love); heads and tails; loop-de-loop; (play) hoop snake(s); p's and q's; playing hoopsnake; six-to-nine; soixante-neuf (69 in French); vice versa.
See also: catch a sixty-nine; dinner beneath the bridge; linguistic exercise; route sixty-nine; thirty-nine.

Quotes:

(1) Bruce Rodgers. The Queens' Vernacular (1972): ' Know what the square root of sixty-nine is? Eight something.'

(2) ' I bowled a 69.' From Encyclopedia of Graffiti Robert Reisner & Lorraine Wechsler (1974).