Mr. Nice Guy

used as a conventional title of courtesy except when usage requires the substitution of a title of rank or an honorific or professional title before a man's surname

used in direct address as a conventional title of respect before a man's title of office

used before the name of a place, profession, or activity or before an epithet (such as clever) to form a title applied to a male viewed as representative of the thing indicated

: wanton, dissolute

: coy, reticent

: showing fastidious or finicky tastes : particular

: in a nice or pleasing way

: man, fellow

: person

: individual, creature

: a rope, chain, rod, or wire attached to something as a brace or guide —called also guyline

: to steady or reinforce with a guy

: to make fun of : ridicule