An edited version of the song, appearing as Side A on the single release, reached number one on the Billboard Black Singles chart. The song was written by George Clinton (credited on some releases as "George Clinton, Jr."); the recording was arranged by Walter "Junie" Morrison and produced by Clinton under the alias "Dr. Funkenstein".

The Funkadelic version is sung by Clinton and several other group members, including Philippé Wynne, who was a former lead singer of the rhythm and blues group, The Spinners, which he left two years earlier.

The song is widely regarded as a funk classic, peaking at No. 77 on the Billboard Hot 100 and topping the US R&B charts in 1979. The lyrics tell of a "girl" who "was a freak of the week" and the man who was dancing with her. He was unimpressed by the Jerk, the Monkey, the Chicken, and the Moose, but was turned on by the Freak.

The song has been heavily sampled by many artists. Hip hop group De La Soul sampled the intro to the song in their hit "Me Myself and I", which reached #34 on the Billboard Pop Charts and #1 on the R&B Charts.

Also LL Cool J ("Nitro"), Everlast ("Never Missin A Beat"), Tone Lōc ("Funky Cold Medina"), MC Hammer & Deion Sanders ("Straight to My Feet"), G-Funk Intro & his unreleased track "Do U Remember". Tha Dogg Pound used the sample in their unreleased track "Can't C Us". Geto Boys sampled the intro for "Homie Don't Play That". The Black Eyed Peas also used the beat behind it to remix their hit single "Shut Up". X Clan sampled the song in Funkin' Lesson. It was also interpolated in the song "Get Away" by Bobby Brown. In 2014, it was sampled in Jessie J's "Seal Me with a Kiss".

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