When you're titty fucking your girlfriend and the two of you are singing a duet.

A blonde, busty country music singer, songwriter and all-around American institution whose gargantuan bra size is surpassed only by her astounding musical talent. Has won a gazillion or so Grammys and has sold nearly as many records.

noun: to describe a work shift that starts at 9:00 am and ends at 5:00 pm. So named after the 1980 Paramount Pictures movie, "Nine to Five", starring Dolly Parton, Jane Fonda, and Lily Tomlin as women office workers. Dolly Parton recorded the movie's theme song, entitled "Nine to Five", which became a #1 hit on the Billboard charts in the same year as the movie's release.

I think it means a girl who has a huge chest. Or wears alot of makeup and dresses flashy.

Working a shift that is 9 to 5

When sledding down a snow-covered hill and there are less sleds than people, it is the act of nearly sharing your sled but sliding down the hill again at the last moment.

In Texas Hold 'Em, it is when the player's hole card are any 9 and any 5, referring to the Dolly Parton movie, 9 to 5.