When you marry and your spouse has a dog.

Common uses: "going to pet my in-law" "my in-law is a bitch" "my in-law wont stop humping my leg"
My wife had a dog. Fifi is now my dog-in-law.
by MicahGrot August 31, 2007
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When a dog falls asleep on ones lap, one is not allowed to move or disturb said sleeping dog.
I can’t make breakfast because Fido is asleep on my lap; I cannot break dog law.
by DogLawAbider February 10, 2018
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Two hot dogs are never enough, yet three hot dogs are always too many.
Campbell thumbed his nose at Buckley's Hot Dog Law when he reached for his third hot dog. He would soon regret this decision.
by buckles75 March 3, 2011
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A person who considers it their role to show children how the world really operates.
On the rare occasion that the children are left in the care of a Dog Track Brother-In-Law, he must be reminded that the kids can absolutely not smoke.
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The dog owned by your spouse's family is called your dog-in-law. (Plural - dogs-in-law)
Hey, my dog-in-law is eating your food.

My dog-in-law is super cute.
by Victoria’s baby October 17, 2017
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