When someone is caught lying. How now is self explainitory. Brown Cow means that they are a liar. Works incredibly well if they are exposed for their lie.
Guy 1: Hey, I know what the capital of Illinois is. It's Chicago.
Guy 2: It's Springfield. How now brown cow?
Guy 2: It's Springfield. How now brown cow?
by gbee93 April 9, 2011
Get the How Now Brown Cowmug. Whenever you make an advance towards the opposite sex and are blatantly turned down without any notification. Can happen through any median of communication ( i.e. in person at a bar, myspace/facebook/other social networking websites.)
1. "Yea, dude! I was talkin to this hot ass bitch on myspace for like three days straight...non-stop! She was diggin my shit! Then she like stopped talkin to me outta no where! I think she moved to like Dutch Pennsylvania...."
"Naw nigga! She just how now, brown cowed the shit outta you!"
"Naw nigga! She just how now, brown cowed the shit outta you!"
by Big Mac & Kevin Pertego Inc. October 3, 2008
Get the How now, brown cowmug.