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2.
When a girl is on the pill meaning she can have sex.
Hey,there's sheila i heard shes on the pill so shes open for business.
by APU & The Stooge August 11, 2011
 
1.
(n.) One within the age of coquetry and over the age of legal sexual consent. Between jailbait and being too old too fuck. Particularly used to descibe easy young ladies.
Lindsey has been open for business for quite a while, haven't you been sucked dry yet?
by Kung-Fu Jesus June 15, 2004