inshallah (in )= if , (sha'a)= willed (Allah)= the name of God.
"if Allah wills for it to happen" / "God willing".
insha'Allah :
1. when one speaks of an activity in the future that he wishes for.
2. sarcastic response when a silly/unlikely/undesirable claim/demand/threat is made.
3. general response when being asked if you would be down for whatever activities in the future, regardless of how you feel about it.
1. inshallah: positively
(i'll be home by 2:00 AM insha'Allah)
(- will you be alright? -insha'Allah.)
2. inshallah: sarcastically
(-you will begging for forgiveness! - yeah insha'Allah <yeah, right>)
3. inshallah: generally
(- will you be on time next time? -insha'Allah)
(- can you bring your brother along? - insha'Allah, will see)