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2.
669
A sexual position involving three adults.

The position can be obtained by three males, one male and two females, or two males and one female.

The first "6" must always be a male. He will insert his penis into the ass of the person in front of him, or the second "6". The second "6" will be performing a "69" with the last sexual partner.
Girl: Tim invited his friend Tommy over last Friday, and we 669'd all night long.
by Wolffie May 24, 2012
 
1.
669
the act of prefroming 69 with another partner who does the second "6" in the butt. here is the order is the of the numbers in gender, 6=male 6=female 9=male
hey i just 669 that milf with her bf
by w6i6l9l February 03, 2009