the fattest, ugliest, meanest, most fake, evil, stinkiest thing (with chin hair) you can imagine.
If my mother in law wasn't so gross and ever got laid she might not be such a cunt.
by Splish Splash October 2, 2003
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A bitter and twisted old hag, who, no matter how much, or what you do, is never good enough.
All my Mother in law does is moan like a bitch.
by Wolves_Ay_We August 26, 2017
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1.Most foul, devious, manipulative, evil, premeditated, fake, smile in your face while stabbing you in the back, worst plague God has ever sent upon us...especially me.

2. The beast who bore my husband.

3. Root of all evil. Angel of Death
I would rather suck on exhaust fumes than live with my mother in law.
by Anra September 13, 2005
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She who spawned the screaming banshee from hell. Oops, sorry. That would be X-mother-in-law.
...the slime oozed from the festering pustules on my x-mother-in-law's face.
by free-at-last. September 23, 2003
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This term is used for defining a mother that is in law.
Man your mom is a lawyer. I guess you could say she is a mother in law.
by xXxP00nS1aY3r420xXx May 28, 2015
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