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2.
a term used to secretly talk about a women being on her menstral cycle.

Boyfriend: Hey can we have sex tonight?

Girlfriend: No, I am still doing inventory.
by lunaskypie June 18, 2008
 
1.
The goods and materials that a business holds for the ultimate purpose of resale
I have inventory of 1000 mobiles in my factory for sale to the distributors
by Transtutors June 07, 2013