This is an informal invented word, based on the word 'alcoholic'. An alcoholic is a person who can't stop drinking alcohol, and a 'workaholic' is a person who can't stop working. It's as if this person is addicted to work. 'Chocoholic' is a similar invented word to describe someone who is addicted to chocolate.

I think it's a person who love to work a lot.

По русски- "трудоголик". Находится в энергетической зависимости от "труда", характерно отсутствие меры.