be all that

be all that

To be remarkably adept, intelligent, good-looking, or successful. Primarily heard in US, South Africa. I don't need to see his test results, I already know he's all that!
See also: all
References in classic literature ?
Beth said nothing, but wiped away her tears with the blue army sock and began to knit with all her might, losing no time in doing the duty that lay nearest her, while she resolved in her quiet little soul to be all that Father hoped to find her when the year brought round the happy coming home.