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A reference to a video on the internet in which a woman viciously rams a dildo into a man's penis as you hear his screaming in agony.
I pissed blood for a month after she pulled the "kids in a sandbox" on me!
by poopmaster5000 November 02, 2006
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Jul 26 Word of the Day
Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed
I got a call from X the other night. She had an extra ticket to a concert she bought for a friend, but they couldn’t make it so she called me to ask if I wanted to go because I am her Second String Friend.
by Deus-ex-machina August 26, 2020
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2
Probably one of the most misleading sites on the web. The video is around 10 seconds long. It starts out like a regular porn video, a girl and a guy are in a 69 position having sex. All of a sudden the girl sticks out some sort of plastic dildo and constantly jams it in the guy's cum hole. Moaning ensues, and the penis nearly splits open. It's a loop video.
Me: Hey, Nick, watch kids in a sandbox *Gives link*

Nick: Uh is that kids playing in a sandbox?

Me: Yeah... just click the link

Nick: *Clicks* Hey this is a porn si- WHAT THE FUCK!
by Some Twink April 23, 2011
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3
Kinds in a Sandbox is a disgusting video in which a woman shoves a vibrator into the urethra of a man
Kids in a Sandbox is a nasty form of female domination
by Shahnawaz November 15, 2007
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