The Johnson is when a man wakes up in the middle of the night, usually trying to get some booty, (not always, see examples below) and is rejected. When this happens, he proceeds to masturbate on his girl, in anger. There's three different known types of The Johnson.
1. The Johnson- Male masterbates on female then in good manor,
cleans it up.
2.
The Clean Johnson- Male masterbates on female in shower, water from the shower cleans her off.
3. The Dirty Johnson- Male is so pissed off because he is rejected that he masterbates on the female and leaves it there, for a
nice surprise when she wakes up.