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When your mom acts like she doesn't care but is really pissed off.
Wow, your mom is being super chill about that party!

Oh, yeah, you'd think so but I have a suspicion that she's just being momchalant...
by RooskiJD December 01, 2009
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2
when you’re mom is stalking you on the phone and you finally call her back and ask what’s up and she goes β€œoh nothing”
My mom has called me ten times even though she knows I’m at work and when I called her back she was completely momchalant.
by Stu Pidman69 December 17, 2018
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