Glory Hole
In a public toilet, a hole is cut into the 
partition between two stalls to
 facilitate anonymous cock sucking.
A tapping foot or peering eye indicates interest.
-1940s-
"Bill told me he got robbed today at the May Company - 
he was standing at a glory hole with his trousers 
pulled all the way down, getting a great blow job, 
when a second guy in the other booth reached into his pocket 
and stole his wallet, just has he was cumming"