Noun. 1. trifler – one who behaves lightly or not seriously. do-nothing, idler, layabout, loafer, bum – person who does no work; “a lazy bum”Click to see full answer. Similarly, you may ask, what is philanderer?Definition of philanderer. disapproving. : a man who has sexual relations with many women especially : a man who is unfaithful to his wife or partner …One may also ask, what is a dabbler? Definition of dabbler. : one that dabbles: such as. a : one not deeply engaged in or concerned with something. b : a duck (such as a mallard or shoveler) that feeds by dabbling. — called also dabbling duck, puddle duck, river duck. Keeping this in consideration, what does troller mean? A person who posts inflammatory or otherwise unwanted material on an electronic forum, especially anonymously. b. The material so posted. [Middle English trollen, to wander about, from Old French troller, of Germanic origin. N., senses 3a and b, influenced by troll.]What is the meaning of Casanova?The definition of a casanova is a man who is passionate about women and has many lovers. An example of casanova is the story of Don Juan.