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"doing the mcfarleys" is a G-Rated term that is used to describe sex in front of younger children.
Amanda: What was all that noise last night ?

Steve: that was mark and his girlfriend. They were fucking like rabbits.

Amanda: Don't say that in front of the kids.

Steve: Sorry. They were "doing the mcfarleys" all night.
by PlayBoyMan June 23, 2010
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