grunt work ( synonym found)
Definition of grunt work:

°Work (especially that which is heavy, repetitive or mindless) that is considered undesirable and therefore delegated to underlings.
"He plans to hire somebody to do the grunt work of digging the trenches for the pipes."
Definition of grunt work:

°Work (especially that which is heavy, repetitive or mindless) that is considered undesirable and therefore delegated to underlings.
"He plans to hire somebody to do the grunt work of digging the trenches for the pipes."
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