ex.) Chris burps in front of your girlfriend, she says ewww and your response is "it's mannery".
ex.) You, your boy, and his girl are hanging out. She says something to him but he doesn't hear because he is entranced watching the game. After she says it again and gets his attention and you all laugh about how into the game he is You could say "your mannery is showing".
ex.)If you spill something and clean it up with a shirt, as opposed to a towel, because the shirt is closer - "That's mannery"
other examples: throwing a perfect spiral, chugging a beer, saying to a girl you don't know/just met "Hey you lets get naked" then her and her friends proceed to hang out with you and your friends (*Note: If you try this or a similar line and it doesn't work that's not mannery you are just a douche bag.)
Chuck Norris has mannery.