thug

Someone with an intimidating and unseemly appearance and mannerisms, who treats others violently and roughly, often for hire.

One of a band of assassins formerly active in northern India who worshipped Kali and offered their victims to her.

In gardening, an over-vigorous plant that spreads and dominates the flowerbed.

To commit acts of thuggery, to live the life of a thug, or to dress and act in a manner reminiscent of someone who does.