from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Crazy, mad, strangely behaving; especially as attributed to hot weather.
from the GNU version of the Collaborative International Dictionary of English
- adv. Too much.
from The Century Dictionary and Cyclopedia
- In music, too much; excessively.
From tropical + -o (“diminutive suffix”). First used by Australian troops in tropical regions during WWII, in the sense “affected by war service in the tropics.”  (Wiktionary)