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, that
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

all that

1. Too, very, usually employed in a negative context meaning not too, not very. For example, The new house is not all that different from your old one. [Mid-1900s] Also see none too.
2. That and everything else of the kind. For example, She enjoys wearing nice clothes and perfume and all that. [c. 1700] Also see and all.
3. See for all that.
See also: all, that
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

be all that

AMERICAN, INFORMAL
If someone or something is all that, they are very impressive and of a high quality. My boyfriend thinks he's all that. I read the book because my friend thinks it's all that.
See also: all, that
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012

be all that

be very attractive or good. US informal
2002 Guardian I can't believe how she throws herself at guys, she thinks she's all that.
See also: all, that
Farlex Partner Idioms Dictionary © Farlex 2017

be all ˈthat

(American English, informal) be very attractive or impressive: He thinks he’s all that.
See also: all, that
Farlex Partner Idioms Dictionary © Farlex 2017

all that

Informal
To the degree expected.
See also: all, that
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in periodicals archive ?
But who maybe pinched Rimanelli under the table one too many times and turned out not to be all that reliable after all.