a curse word which is often directed towards someone
a word which is refered to a person who has a small penis... "Small Dick Freak"
"f*uck u SDF!!!" or "That guy... ahhh hes a proper SDF!"
by sdx999 November 16, 2008
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SDF stands for the Sony Defense Force, which is a group of rabid supporters of Sony who defend whatever Sony does on websites and message boards.
"Man did you see that troll? He called the Wii and 360 garbage and the PS3 as the best thing ever."

"Yeah he must be part of the SDF"
by Linkthelegend2 June 8, 2007
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Shit Dammit Fuck it all to hell. Commonly used as SDF when it would not be socially acceptable to yell these aloud
"SDF they never get my order right here"
by Longshot March 3, 2008
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1. Self Defense Force. Japan's counterpart to the U.S. National Guard. They have a few ships, some planes and more. They are for Japan's defense since they don't have a true armed forces. An article in their constitution states clearly that war is abolished "forever".

2. Sick Daughter Fucker. We know what an SMF is. A SDF is a disgusting pervert who sexually molests HIS or HER own daughter.

3. Stupid Dumb Fuck. A person who thinks (s)he has smarts, class and cool but is a such a rancid sack of douche so unbelievably idiotic you'd wonder how they get anywhere in life without some guide to help them BS their way thru the game of life. An absolute cretin.
1. The SDF was formed after WWII to help the new democracy defend itself from attack. Japan wanted to break away from its fascist past so its new constitution freed them to focus on manufacturing and trade to rebuild their economy and enable them to become the trade powerhouse they are today.

2. MacKenzie Phillips wrote in her book that she had an incestuous sexual relationship with her dad (of the 60's group The Mamas and the Papas). He was a sicko, a horrible excuse for a man. He was a sick daughter fucker - an SDF. May he burn in hell for his evil crimes.

3. Donald Trump has gushed about his daughter Ivanka . He has said live on TV that he'd like to MARRY her! There are pictures of her (as an adult) sitting on his knee like a little girl while he fondles her butt. Other scenes show him coming up behind the seated Ivanka and he massages her shoulders and then squeezes her tits! There is video footage of the Trump family at a Beach Boysshow where she gets up, sits on her daddy's lap and gives him a lap dance! He often is seen kissing her right on the LIPS like he wants to fuck her. Absolutely nauseating. We all know how immature, greedy. and uncouth Trumpalina is, and he ain't qualified to govern a piss pot. On top of that he's a perv, an incestuous scumdog and an SDF. He's a shitbag.

4. Britney Spears,Paris Hilton,Sarah Palin,Snooki,Hillary Duff,Hillary Clinton, Tom Greenand Pauly Shore are all SDFs.
by I Saw U2 Live Twice July 3, 2017
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Suncoast Dirt Foot; one that has feet that looks like they have never owned a pair of shoes in their life; feet that look like they belong to swamp thing; people that live in sun coast have these feet; feet that look similar to alligator feet; Feet that have nails jagged enough to walk up walls with ease;
Damn look at that bitch, she has the worst case of SDF I have seen. She needs put some shoes on them alligator feet.
by NFM311 October 18, 2011
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I was on my boo's facebook pictures and he was looking SDF!
by woaahhokayimflyy August 14, 2010
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Used in personal ads for Safe and Disease Free. Safe meaning practices safe sex.
Things are pretty bad and I know the only satisfaction i'll get is sex. There's no calming me down when I get this way. NSA tonight won't deal with my drama. Guess that leaves you.. haha.

Mail me with your pics and please be SDF.
by tripple530 February 1, 2014
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