Top Definition
Length of time available for a spouse or live-in mate to notice a newly purchased item before the purchaser can claim that the item has been there forever. The item must be conspiculously placed, and cannot be hidden. Good Luck!
I bought a new guitar, snuck it in the house and put it in the stand with the rest. Since Janie didn't notice for two weeks, the "48-hour" rule had lapsed so I could claim it had been there the whole time.
by LaustinTX73 May 24, 2010

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In MMO strategy games, the convention that a player will be unprotected by a new alliance he or she joins for the first 48 hours. This allows other players who have had a beef with him to settle things before the new alliance starts defending him.
Alliance Policies: The "48-hour" rule is observed.
by JEH-IT January 15, 2016

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Lotsa space for your liquids.

Buy the mug

The Urban Dictionary Mug

Your favorite word on a white mug.

Create a mug

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug

The Urban Dictionary T-Shirt

Soft and offensive. Just like you.

Buy the t-shirt

The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

Buy the t-shirt