relaxing the gentleman's way
In a word- masturbating.
"Sorry, I can't come out tonight, I'm busy; I'm relaxing the gentleman's way."
relaxing in the gentlemans way
Masturbating
"Roger decided to have a quiet night in in front of the television relaxing in the gentlemans way."
to-relax-in-the-gentleman's-way
to partake in "self pleasuring"
"wacking off"
"choking the chicken"
"knocking one out"
"choking the chicken"
"knocking one out"