sleep over

This doesn't have to entail just girls.
This is the act of two or more friends spending the night at one of the persons house. Usually involves the visitors bringing sleeping bags and sleeping on the floor. Common activites tend to revolve around a sleep over: Pillow fights, Board Games, Dungeons & Dragons, Makeovers, and talking about the opposite sex.
Most Pajama Parties involve a sleep over

Hey, let's call up everybody and have a sleep over this weekend.

sleep over by AdamBoBadam September 23, 2005

Sleep over

When you find out your friends are gay in the least subtle way.

Hey, guys wanna have a sleep over
I could have a sleep over at my house

Sleep over by I wanna fuck your mom October 31, 2018

sleep over

When a couple is so exhausted after sex, and the women is on top and they both fall asleep while he's still inside her.

Me an me girl was so tired after sex last night that we ended up doing a sleep over.

sleep over by sleep over August 6, 2014

sleep over

sleep over when girls get together to talk and comb each others hair

this sleep over is a total freaking drag

sleep over by sara May 13, 2005

Virtual Sleep Over (VSO) 

A virtual sleep over (VSO) is when two people who want to sleep in the same bed but can’t due to any reason so they FaceTime (or video call through any platform) keeping the connection open all night.

Hey babe, I am sorry I am away on business in Ottawa Canada tonight but we can still have a virtual sleep over (VSO) and be close to each other that way.

Virtual Sleep Over (VSO) by Woody17 February 14, 2020

phone sleep over 

when you and another person (usually your boyfriend/girlfriend) stay on the phone all night while sleeping so they are the last person you talk to before you go to sleep, and the first one that wakes up says goodmorning and wakes up the other person

John: hey wanna have a phone sleep over tonight?
Carly: Sure! I'll charge my phone to get ready!

phone sleep over by happymeme February 22, 2011

Ciotti Sleep-Over

A night spent with a woman that involves sleeping in the same bed, but not engaging in kissing or intercourse.

Miguel totally had a Ciotti Sleep-Over with Taylor last night; he didn't even get to second base!

Ciotti Sleep-Over by kkpatomatic November 20, 2010