The definition of tough guy from the Free Dictionary:

Noun 1. tough guy - someone who bullies weaker people

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bully, hooligan, roughneck, rowdy, ruffian, yob, yobbo, yobo, tough - a cruel and brutal fellow

Ted, Teddy boy - a tough youth of 1950's and 1960's wearing Edwardian style clothes

http://www.thefreedictionary.com/tough+guy


Best way to catch the smart ones? Get an idiot working for them.