Have One's Work Cut Out For One Meaning

(idiomatic) To face a large task or project.

Example:   If he plans to translate all the idioms, he has his work cut out for him.
2011 September 16, Ben Dirs, “Rugby World Cup 2011: New Zealand 83-7 Japan”[1], BBC Sport:
  While Henry will no doubt earmark areas for improvement, and take into account the weakness of the opposition, it was a far more efficient and focused display than against Tonga and suggests the French will have their work cut out to avoid finishing second in the group in Auckland next week.