6 o clock shadow 

The shadow that results from a man who is naked. The silhouette it presents is one of the man's general figure with his schlong hanging down in the limp position. It's easier to see on guys with massive cocks because it extents further out from their body (source: your mom :) ). It's called a 6 o clock shadow because the penis pointing straight down resembles a clock when the hour hand is at 6.

"I was in the locker room with Jack and his towel fell down and-and I just couldn't resist. I looked down at the floor and he had a 6 o clock shadow."

6 o clock shadow by Suckmytoes_77 October 11, 2023

6 o'clock Shadow 

The stubble on your balls when you miss a shave.

I'm being poked by my 6 o'clock shadow.

6 o'clock Shadow by Northside Johnny December 8, 2012

6 O'clock shadow 

When their asshole hasn't been shaved in a while and it's a little stubbly

Her 6 O'clock shadow was tickling my junk

6 O'clock shadow by Tandy 1000 December 1, 2022