যেকোনো শব্দ খুঁজুন, যেমনঃ donkey punch:
 
1.
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.
লিখেছেন- Doyman. 7 de অক্টোবার de 2007
69 23
 
2.
A small article of clothing worn by a homosexual man under a swimsuit or alone. Especially used at nighttime.
When I went swimming with Peter, he was wearing the sexiest diphthong.
লিখেছেন- Eptomologizzle 10 de মার্চ de 2005
19 56