Green’s Dictionary of Slang

cooter n.1

[US dial. cooter, a freshwater turtle]
(US campus)

1. a female.

[US]Eble Campus Sl. Fall 2: cooter – female; used strictly by athletes; cooter madness – girl crazy.

2. (also cooder) the vagina.

[US]Eble Campus Sl. Nov. 2: cooter – female genitals.
[US]S.K. Adams Come Go Home with Me 58: Marta’s middle daughter [...] was called Cooder. If Marta [...] had known that the mountain meaning of that word described [...] the female anatomy, I reckon they wuld have found another nickname.
[UK]Roger’s Profanisaurus 3 in Viz 98 Oct. 9: cooter 1. n. prop. US. A character from ‘The Dukes of Hazard’. 2. n. The visible contents of Daisy Duke’s shorts in ‘The Dukes of Hazard’.
[US] ‘The Cooter Monologues’ at 20 Jan. 🌐 Cooter. My friend Fran used to use this, and I find it really amusing. [...] I think that there’s some kind of a turtle that people call cooters, too. [...] It may be a snapping turtle/vagina dentata thing.
at 🌐 [cartoon caption] Sometimes my cooder gets so wet I cain’t stand it. 30 May 🌐 I flashed everyone my cooder on the way [...] to lunch. 16 July 🌐 She stats hunching her cooder against his trim hairy pubic mound.