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grow (up)on (someone or something)
1. To become more liked and appreciated by someone. I didn't like her bubbly new assistant at first, but she grew on me in time.
2. To become more obvious to someone. Unease grew upon me as we walked into the creepy old house.
See also: grow
grow on someone
1. Lit. [for a fungus, tumor, parasite, etc.] to live and grow on someone's skin. I've got this stuff growing on me and I want to get rid of it. Is that an ink stain or is something growing on you?
2. Fig. [for something] to become familiar to and desired by someone; [for something] to become habitual for someone. This kind of music grows onyou after awhile. Kenneth sort of grows on you after a while.
Also, grow upon.
1. Gradually become more evident. For example, A feeling of distrust grew upon him as he learned more about the way the account was handled . [c. 1600]
2. Gradually become more pleasurable or acceptable to, as in This music is beginning to grow on me. Jane Austen had it in Pride and Prejudice (1796): "Miss Bennet's pleasing manners grew on the good-will of Mrs. Hurst." [c. 1700]
grow onor grow upon
1. To be nourished by something and develop in size or quality: Wheat does not grow on sandy soil. Baby mice grow on only a few drops of milk every hour.
2. To become gradually more evident to someone: A feeling of distrust grew on me.
3. To become gradually more pleasurable or acceptable to someone: Just wait; the bitter taste will grow on you.