Usually young white beta-males who live on Reddit or 4Chan. They wear fedoras with t-shirts. They open doors for women ("m'lady") or do other nice things not because they're polite people, but because they want to get laid.
Also related: talking about getting friend-zoned, loving V for Vendetta, libertarian politics, thinking they're the smartest person in the chatroom, basement dwelling, etc.
The gentlesir tipped his hat to m'lady and opened the door for her. She was just a random bystander and walked in without acknowledging him. He muttered to himself about how rude women were these days before checking the Reddit thread about anarchism.
Usually refers to a man under 5' 9" who compensates with masculine activities - such as joining the Navy, Army, or Marines, working outmultiple times a week, shaving their chest and more commonly then not, their heads and driving a motorcycle
The process by which an established, traditionally Jewish neighborhood changes demographically due to an influx of non-Jewish young urban hipsters.
A classic example of gentilification is the displacement of Hasidic Jewish residents and/or cultural influence from the Williamsburg area of Brooklyn as a wave of young edgy new residents and visitors has taken hold.