big on (something)

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big on (something)

Very interested or invested in something. My sister loves going to clubs because she's really big on dancing. My family is big on education, so I know I'm going to college next year.
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Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

big on

Enthusiastic about, as in Dad is big on Christmas with the whole family. [Slang; mid-1800s]
See also: big, on
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.

big on

Enthusiastic about; partial to: "a patriotic youth organization big on military-style marching drills" (Earl Swift).
See also: big, on
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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