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  • going steady, going out with someone.

    e.g. Brendan's been doing a strong line with this bird from Montenotte since he went up to the college. We hardly see him any more.

    February 23, 2007

  • Trust America to elevate this phrase to "using cocaine"

    e.g. Did you see that video of 50 Cent doing a line?

    September 19, 2009