Word Study
troppo
CIDE DICTIONARY
troppo, adv. [It.].
Too much; as, allegro ma non troppo, brisk but not too much so. [Webster 1913 Suppl.]
OXFORD DICTIONARY
troppo, adv. Mus. too much (qualifying a tempo indication).
Idiom
ma non troppo but not too much so.
troppo, adj. Austral. sl. mentally ill from exposure to a tropical climate.
For further exploring for "troppo" in Webster Dictionary Online