The phrase "to do a line" means to snort a small, measured strip ("line") of a powdered drug, most commonly cocaine, through the nose. The structure is informal slang where "line" refers to the arranged powder and "do" means to consume or use it. It is commonly used in drug-related contexts and informal speech to describe this method of administration.

تعريف ومعنى "do a line"في اللغة الإنجليزية

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