look a gift horse in the mouth

: to make sure or take care (that something is done)

: to ascertain by the use of one's eyes

: to exercise the power of vision upon : examine

: the act of looking

: glance

: the expression of the countenance

: a notable capacity, talent, or endowment

: something voluntarily transferred by one person to another without compensation

: the act, right, or power of giving

: to endow with some power, quality, or attribute

: to make a gift of

: present

: a large solid-hoofed herbivorous ungulate mammal (Equus caballus, family Equidae, the horse family) domesticated since prehistoric times and used as a beast of burden, a draft animal, or for riding

: racehorse

: a male horse

: to provide with a horse (see horse 1a(1))

: to move by brute force

: to be in heat or estrus

: of or relating to a horse (see horse 1a(1))

: hauled or powered by a horse

: large or coarse of its kind

: the natural opening through which food passes into the body of an animal and which in vertebrates is typically bounded externally by the lips and internally by the pharynx and encloses the tongue, gums, and teeth

: grimace

: an individual requiring food

: speak, pronounce

: to utter bombastically : declaim

: to repeat without comprehension or sincerity