A mathematical equation representing productivity (especially on all nighters). It is as following:

P = (1/C*S)(E)

Where P is productivity, C is the catchiness of the song playing, S is sleepiness, and E is energy drinks consumed in the last hour.
Bro 1: Man, I had a shitton of homework last night.
Bro 2: Did you at least get it all done?
Bro 1: Law's Law, bro.
by MonsieurLaw December 05, 2011
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Your spouse's brother's/sister's spouse. Basically someone who will never be related to your kids, so you don't have to give a shit about. The feeling is mutual.
Your Wife: "My brother Todd's wife is such a cow!"

You: "Who gives a rat's? She's my in-law in-law."
by Uncle Des August 09, 2010
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Teacher: You didn't show your work on the homework
Student: It doesn't say "show your work," so by law I don't have to
by malignanttumour May 13, 2019
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People who don't like you and are constantly talking about you, spreading slander on Urban Dictionary!
Oh, you haven't met (insert word) until you've met my in-laws!
by This is crazy March 31, 2013
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Someone who will be a prime suspect after your murder. Usually mother-In-laws are the worst, not because of their hatred of you, but because the will question you to death.
Stereotypical veteran father-in-law: "Let me show you my M14."

Mother-in-law: "You should take better care of the kids, they're only 21 you know."
by Wedding Crasher August 03, 2010
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