When:
Lookups on Merriam-Webster spiked on November 28, 2010.
Why:
The American cables revealed by WikiLeaks included the not necessarily diplomatic detail that Libyan leader Mu'ammar al-Gadhafi travels with a "voluptuous blonde" nurse.
Voluptuous means "suggesting sensual pleasure by fullness and beauty of form" - in other words, "attractively curvy."
It comes from the Latin word for "pleasure."
Love words? Need even more definitions?
Merriam-Webster unabridged