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1.
arabic islamic origin - meaning 'god-willing' or 'if god is willing'
I'm coming home, I'll be there by Tuesday morning, inshallah.
by hhb September 14, 2006
 
2.
A general term that arabs use when they are not willing to fulfill their commitments.

Also means God (in this case Allah) willing.
Omar: so when you gonna pay me a visit?
Abdul: soon inshallah
by Yamen May 12, 2008