good egg, a
good egg
Someone who is known to be trustworthy and kind. Joey's a good egg. He always makes time to help others in need.
good egg, a
Also, a good scout. An amiable, basically nice person. For example, You can always count on her to help; she's a good egg, or His friends all think Dad's really a good scout. This colloquial antonym of bad egg dates from the early 1900s, as did the variant.
See also: good