GRAFT is normally when you take a branch from one plant and splice it into another plant to combine them.

If someone spent all day doing this, then you can say that they GRAFTED ALL DAY YESTERDAY.

Also, it can mean for a doctor to take pieces of skin from one part of the body and use it to patch another part of the body.

I thought it meant that someone worked hard?!

I’ve never heard it used like that before.

This is British slang I guess

I think you’re right. https://www.google.com/search?sxsrf=ALeKk00-SJ8Z3pGqVOMYvg_MSXZcS9Fbdw%3A1598196877109&ei=jYxCX8OeBov-tAWG6bGQBw&q=%22grafted+all+day%22&oq=%22grafted+all+day%22&gs_lcp=CgZwc3ktYWIQAzIFCCEQoAE6BAgAEEc6BAgjECc6BAgAEEM6CAgAELEDEIMBOgUIABCxAzoLCC4QsQMQxwEQowI6AggAOgoIABCxAxAUEIcCOgcIABAUEIcCOgcIABCxAxBDOgUILhCxAzoICC4QxwEQrwE6AgguOgYIABAWEB46CAgAEBYQChAeOgUIIRCrAlD_nAVY_rMFYLi3BWgAcAN4AIABlwGIAakPkgEEMi4xNZgBAKABAaoBB2d3cy13aXrAAQE&sclient=psy-ab&ved=0ahUKEwiDmZCp07HrAhULP60KHYZ0DHIQ4dUDCAs&uact=5

https://dictionary.cambridge.org/dictionary/english/graft
UK informal
work:
I've never been afraid of hard graft.

👍🏼

Он вчера вкалывал весь день.

Да уж по-русски лучше не скажешь)👍

😂