1. A blanket (or toy) carried by a child to reduce anxiety

Stems from the Peanuts comic where the character Linus always had his blanket with him.

2. (informal) anything that an adult person uses to reduce their anxiety

This phrase can also be used to indicate a male friend whom a girl has no romantic interest but uses him to to cock block other males at parties, dances, or other events.
Whenever my boyfriend doesn't want to go out dancing, I take Kyle to keep the other guys away. He's sort of my security blanket.
by TheBlankey January 29, 2006
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An excuse for the government to ignore the constitution. (We all want to be ‘safe’ don’t we?)
Despite the 5th amendment, the Iraqi and Afgan prisoners were denied a fair trial in the name of national security.
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usually employed by a contracted "security" company, these people are given absolutely no means to control dangerous situations, but are expected to keep things under control until the police arrive. their job is to give the "perception" of security, without actually having to go through the hassle of having real training. usually known as rent a cops, they must also deal with a complete lack of respect from the patrons of the mall they serve. low pay and horrible hours make the job ideal only to lazy fat people and college students.
concerned citizen: that man just ate my daughter!
mall security guard: wtf do you want me to do, all i have is a flashlight! this radio doesn't even work outside the building.
by bah March 5, 2005
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a security dick is a guy that's sole purpose on earth is to provide security for his girl friend not knowing that he is being used for that purpose only

a dumb guy that is pussy whipped and is being used

any guy that goes to a 9-5 5 days a week and works like a dog to support a woman and or girl friend that is cheating on him behind his back .

laura was low on money so she went to the local bar to pick up a security dick to sponsor her cunt through life so she wont have to work .

2-a guy was picking on laura today so she ran to her guy friend/security dick for protection only the security dick would not have protected her if he knew the guy that was picking on her was actually her boy friend .
by zebra22 August 4, 2008
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Formally known as McAfee Antivirus, Intel Security boasts little to no improvement over it's predecessor. The overall difference between McAfee Antivirus and Intel Security is that Intel Security will be hardware integrated, which means that the only way to be rid of this horrid piece of software is to avoid purchasing products with Intel chipsets.
"McAfee in hardware... This can't be good." - Mike (not Cox) of ZDNet.com

As Intel Security is merely an attempt to rebrand McAfee Antivirus after Intel's breathtaking $7.7 billion dollar acquisition of the company, see McAfee
by TheMightyTitan January 9, 2014
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