Refers to a person who seduces or deceives others, often in romantic contexts. Can be used for both the act and the person, but most commonly describes a charming, manipulative man. Derived from the verb 誑す (たらす, 'to cajole, deceive').
See also: 垂らす
He's famous for being a womanizer.
Watch out for that smooth talker.
Katakana spelling sometimes used for emphasis or in casual writing.
Derived from the verb 誑す (たらす, 'to cajole, deceive'), which itself is of uncertain origin. The noun form たらし refers to a person who engages in such behavior.