Similar to a twenty-one gun salute, but with cocks. Used as a mark of respect for absent friends, or to toast the end of a particularly enjoyable social occasion. The trousers may be dropped or the penis merely flopped out; it is the saluter's choice. Penises are held upward, like a cannon, while a moment of silence is observed.
N.B. It is considered extremely bad form for the penis to be anything other than completely flaccid when performing a one cock salute.
Let's give her a big one cock salute. It's what Kewley would have wanted. (If, for example, Kewley was the friend who was unable to attend).
Our antics in the ball pool deserve a big one cock salute.