No, lush means to be bursting with life, or to be rich and pleasing. I usually think of it in terms of the beautiful green lushness of the rainforest, if that helps. However, the urban dictionary defines it as a slang term for cool or good, so if you heard it in that sense, I guess I could understand how you thought it meant encouraging. I hope this answers your question! :D
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Answer:
it is described to go in one ear and out the other for them