bare, adj.¹ — Green’s Dictionary of Slang

bare adj.¹

bare-balls (adj.)

(US) completely naked.

1985

‘John Coriolan’ Dream Stud 142: [H]is [...] numerous breathtaking bare-balls spreads in skin mags [Simes:DLSS].

bare-butt (naked) (adj.)

(US) naked.

c.1972		‘S. Bennet’ Getting Hard 37: [H]e knew damn well I was barebutt under my Levi’s [Simes:DLSS].
1985		W. Leyland Lust 28: I was seriously considering posing bare-butt [Simes:DLSS].
1995		Campus Tales (NJ) Jan. 89: [B]arebutt-naked [...] gliding like a fish through the reflected rays of the early-evening setting sun, he was beautiful [Simes:DLSS].

bare-dick (adj.)

(US) not using a condom.

1996

S. O’Hara Do-It-Yourself 162: I’d felt that bare-dick feeling before [...] but never with the psychological thrill I was getting here [Simes:DLSS].