eierlegende Wollmilchsau

Etymology
, from earlier. The concept of a "Schwein, / das Merinowolle trägt / und dazu noch Eier legt", a "pig / that bears merino wool / and furthermore lays eggs, too" is mentioned in poetry as early as 1959.

Noun

 * 1)  an all-in-one device or person which has (or claims to have) only positive attributes and which can (or attempts to) do the work of several specialized tools