2 definitions by Doyman.

A great Spanish word meaning "I give."

Although, it's not as great as "diphthong."
Doy quesosisimo vengaza!

Doy, you diphthong.
by Doyman. October 8, 2007
Get the doy mug.
A vowel combination consisting of a weak vowel and a strong one.

It is more commonly used as an insult, seeing as it is a legitimately funny word.
There is a diphthong in "loud."

YOU'RE A DIPHTHONG.
by Doyman. October 8, 2007
Get the diphthong mug.