junk gap 

The space between the anus and genitalia. The most likely place for faeces and all kinds of junk to get trapped.

I didn't realise I hadn't wiped my junk gap properly.

junk gap by Wownewstome! May 27, 2014

Junk-Trunk Gap

1. Male Taint
2. The region between the Penis and Balls (Junk), and the butthole(Trunk)

1. Junk-trunk gap give it a slap.
2. He enjoyed a visit to the junk-trunk gap during orgasm.

Junk-Trunk Gap by One nice bun August 2, 2009