"Sometimes the terms STI and STD are used interchangeably. This can be confusing and not always accurate, so it helps first to understand the difference between infection and disease. Infection simply means that a germvirus, bacteria, or parasitethat can cause disease or sickness is present inside a persons body. An infected person does not necessarily have any symptoms or signs that the virus or bacteria is actually hurting his or her body; they do not necessarily feel sick. A disease means that the infection is actually causing the infected person to feel sick, or to notice something is wrong. For this reason, the term STIwhich refers to infection with any germ that can cause an STD, even if the infected person has no symptomsis a much broader term than STD."
http://en.wikipedia.org/wiki/Sexually_transmitted_disease#Classification_and_terminology
"Sometimes the terms STI and STD are used interchangeably. This can be confusing and not always accurate, so it helps first to understand the difference between infection and disease. Infection simply means that a germvirus, bacteria, or parasitethat can cause disease or sickness is present inside a persons body. An infected person does not necessarily have any symptoms or signs that the virus or bacteria is actually hurting his or her body; they do not necessarily feel sick. A disease means that the infection is actually causing the infected person to feel sick, or to notice something is wrong. For this reason, the term STIwhich refers to infection with any germ that can cause an STD, even if the infected person has no symptomsis a much broader term than STD."
http://en.wikipedia.org/wiki/Sexually_transmitted_disease#Classification_and_terminology
dui
dwi
oui
owi
omvi
duil
duii
dwai
dwui
dubal
ubal
http://drunkdrivingdefense.com/general/dui-words.htm
My friend, a youngish teacher uses it "officially" all the time at school. And there's this article: http://www.theglobeandmail.com/news...ts-a-plane-its-captain-condom/article1465076/