Where one participate in the act of masturbation swiftly followed by entering a warm/hot bath.
*WARNING* - Its is recommended not to have a Gentleman’s Knockout before planned activity as performance will be affected.
“Think I might stay in and have Gentleman’s Knockout tonight”.
“Can you help me move some furniture mate?”
“I’m going to be no good to you mate, I’ve just had a Gentleman’s Knockout”
an old womans saggy tits that hang down and knock against her knees with every step she takes. some men find this erotic and very hot sex can stimulate a penis to pentrate through the knee knockers and enter the vagina.