empty suit
An unimportant person; also, a phony. For example, Don't pay any attention to him—he's just an empty suit, or She acts as though she knows what she's doing, but she's really an empty suit. This graphic expression calls up the image of an empty suit of clothes. [c. 1970]
Words nearby empty suit
empty cow,
empty morph,
empty nest,
empty nester,
empty set,
empty suit,
empty word,
empty-handed,
empty-headed,
empty-nest syndrome,
empty-nester