To be content and satisfied with your life and surroundings, even when something which may destroy these conditions is imminent. Generally requires the ability to be able to not be concerned about relative dangers nor your shortcomings in life, unless you happened to have achieve most your goals, in which case complacency will come. It is a good feeling to be complacent but difficult to achieve for some people. To be complacent all the things you want to have must overlap, if you desire something which you do not have you will not be fortunate enough to achieve this feeling. If you feel a genuine happiness it is accompanied by complacency.
"I would be complacent if I could convince a girl to go ass to mouth."
"Complacency seems so simple, like, fuck it
let me be the one you fight and call Mr. Right"