have something against

have (something) against (someone or something)

To dislike or be opposed to someone or something. A specific thing does not have to be stated between "have" and "against"—words like "something" and "anything" are commonly used there. A: "I knew you had something against Janet!" B: "She just irritates me, that's all." The board didn't have anything against my proposal, so I'm allowed to start working on it now.
See also: have
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

have something against

Be opposed to, especially for a particular reason. For example, Do you have something against this plan? or Annie must have something against Mary, because she's always so surly when they're together .
See also: have, something
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.
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