slipknot
noun
slip·knot ˈslip-ˌnät 
: a knot that slips along the rope or line around which it is made
especially : one made by tying an overhand knot around the standing part of a rope see knot illustration
Example Sentences
Recent Examples on the Web Simply wrap a tree strap around each tree and pass the strap back through the loop to create a simple slipknot that can attach directly to the hammock. 
Timothy Dale, Better Homes & Gardens, 17 May 2022 Somoano said the rope’s loop-end was manufactured, not tied with a slipknot. Los Angeles Times, 26 June 2020 To lubricate the slipknot, Brazile uses baby powder. Melissa Lyttle, Smithsonian, 13 Dec. 2017 A boy from Boston was a little too handsy retying my sash into a slipknot. Ella Alexander, Longreads, 12 July 2017 And as he was slammed down the mountain, the rope slid up and its slipknot tightened around his neck, throttling him. Craig R. Mccoy / Staff Writer, Philly.com, 12 July 2017
Timothy Dale, Better Homes & Gardens, 17 May 2022 Somoano said the rope’s loop-end was manufactured, not tied with a slipknot. Los Angeles Times, 26 June 2020 To lubricate the slipknot, Brazile uses baby powder. Melissa Lyttle, Smithsonian, 13 Dec. 2017 A boy from Boston was a little too handsy retying my sash into a slipknot. Ella Alexander, Longreads, 12 July 2017 And as he was slammed down the mountain, the rope slid up and its slipknot tightened around his neck, throttling him. Craig R. Mccoy / Staff Writer, Philly.com, 12 July 2017 Word History
First Known Use
1659, in the meaning defined above
Kids Definition
slipknot
noun
slip·knot ˈslip-ˌnät
: a knot made by tying the end of a line around the line itself to form a loop so that the size of the loop may be changed by slipping the knot