Purposely not reading a Snapchat or other form of instant messaging for a period of time to make it seem that you are busy with other things besides waiting for them to text you. Not to be confused with leaving someone on read.

George: Dave didn't open my Snapchat for 5 minutes, even though he's doing literally nothing else
Hannah: Sounds like he's leaving someone unread.

leaving someone unread by attarax June 7, 2019

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leaving the porch light on

When a swinger couple, or an otherwise cheating spouse puts out a subtle hint that their significant other isn't home and they are available to cheat.

Often used to let another cheating spouse know the coast is clear to sneak in a house and start bumping uglies for a quickie

Karen wanted to let Dan know she was ready for some dirty cheating sex so started leaving the porch light on when her husband was gone for work

leaving the porch light on by Rick2024 June 11, 2023

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Leaving the lid off the blender

To leave the lid off the blender is to invite disaster by rushing into something unprepared. It comes from the mess created by forgeting to check the lid is on properly on a blender leading to the walls getting coated in whatever it contained.

Guy 1: Dude! You didn't revise?
Guy 2: Yeah I know, I'm totally leaving the lid off the blender.

Leaving the lid off the blender by whatifweasel March 20, 2009

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Leaving A Trail

When you itch or in anyway cause your pubis to fall off.

It was obvious that Jack was whacking off in my bedroom because he was leaving a trail.

Leaving A Trail by Thomas Johanson (Worlds Greates Tennis Playa) December 1, 2003

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