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3. slug away (at something)

slug away (at something)

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slug away (at something)

To continue trying or working diligently (at something); to plug away (at something). I'm really not very good at math, but I've got to keep slugging away if I want to get into an engineering program. John's been slugging away at the new project, but I don't think he's enjoying it very much.

See also: away, slug