Chlamydia, the STD transmitted through sexual intercourse,i.e. genital copulation. It is a bacterial infection that should recieve medical attention immediately and can cause numerous problems in women and men alike.
Slut 1: Oh Betty, I got the Clam!
Betty: Ahahahaha, that sucks slut.
by The Informer (for your health) December 26, 2007
Top Definition
The clam is feared in all countries world wide. The clam is when your parter's vagina becomes a certain age and becomes hard/crispy and dry.
Mary got THE CLAM for her birthday :'(
by SHENZILLA December 14, 2010
a common nickname for the std properly known as chlamydia.
Bob fully intended on sleeping with Sue until he found out she had the clam.
by effyxstonem April 19, 2009

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