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1.
stands for "it's no big deal!"
mom: BETH ANNE!
beth anne: wu?
mom: your cell fone bill is whats up. all this texting!
beth anne: omg INBD!
mom: it is a big deal! who are you texting 50 times a day??
beth anne: IDK my bff jill?
mom: well tell ur bff jill that i'm taking away your fone!
by m.r.a. June 29, 2007
 
2.
its no big deal commonly used to talk about money
Mom: This is outragous! Its too expensive!!!
Kid: Omg! inbd!!!!
by Lexi Nicole April 23, 2007