Something being top notch, really cool, or particularly on point.
"Check out my new chicken hat."
"Killer trebuchet! "
Opinions dished out from sheltered suburban mothers in Facebook comments, blogs, and their favorite coffee clutch that are based on intuition and rumor, rather than science, deductive reasoning, and a well-reasoned perspective.
"I am sick of all the mommy logic in the comments section! Why do these people all think they are an expert on vaccines/politics/social policy/news headlines/etc."