1) Something the general populous of Earth lacks.

2) The ability to discern what is right and what is wrong.

3) The ability to discern what is intelligent and what is stupid.
The blaming of obesity on fast-food restaurants and not on people who should know that fatty food makes you fat.
by Metropolitan Grey November 12, 2003
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A phrase used by someone who wants any critical analysis of what they are saying to stop immediately.
"Global warming can't exist because it was cold last winter. That's just common sense."
by Al Benedict June 11, 2009
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The term should speak for itself. A Sense which SHOULD be common to everyone. Usually refers to any sort of logic that should be obvious to anyone.
It is dangerous to play with sharp objects.

Don't touch the posionous snake.

If you buy a Sega product you are just throwing your money away on something that will not have any new games released for it shortly after its release.
by Sega Slayer March 16, 2004
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1) Putting the pieces together using the knowledge that one already has. Usually obtained by having actual life experiences, as opposed to sitting at a desk of in front of a textbook all day.

The only type of knowledge in life that is truly useful over 99% of the time.
1) Jimmy spent eight years at his desk getting his advanced degree in mechanical engineering. He was hired happily straight out of college making $105,000 a year, but ultimately failed at even the simplest of automotive tasks, since he lacks the common sense to so much as change his oil.

It also took him 45 minutes to find the entrance on the hooker he hired on a lonely Friday night.
by the way, do you like dags? September 27, 2008
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Being able to see the outcome of your actions before you do them.
Driving too fast in the rain? Common sense tells you that you could lose control.
by Scarlettpoppies December 17, 2018
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It was announced today that Common Sense passed away last night in her sleep. Common Sense has been bed-ridden for the past several years as a result of severe atrophy from lack of use. Common sense was preceeded in death by her mother, personal accountability, and father, integrity.
Bob is a card carrying member of the ACSU... the American Common Sense Union.
by scorekeeper June 27, 2004
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Knowledge that is "sensed" to be true by everyone, but results in most believing the world is flat. Tends to be an overused excuse by pseudo-intellectuals to prove their own vapid points.
John: "I can't belive Kelly failed her test. She studied and everything..."

Tommy: "But she's blonde. Everyone knows blondes are ridiculously stupid. It's just common sense."

John: "What?"
by That Person Who's Wrong. February 20, 2010
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