To have experience and skill in an activity. Before trying to make any pottery, it is better to get advice from someone who knows his stuff in ceramics. Compare: DRY BEHIND THE EARS.
know one's stuff|know|stuff
To accept acquaintance and accomplishment in an activity. Before aggravating to accomplish any pottery, it is bigger to get admonition from addition who knows his being in ceramics. Compare: DRY BEHIND THE EARS. Dictionary
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類似の言葉の辞書、別の表現、同義語、イディオム イディオム know one's stuff|know|stuff