Sleepy Sillies 

noun. uncontrollable laughter when over tired. the unit will laugh at even the stupidest things and may respond with harsh words that don't even make sense. the unit may even result in throwing things

During the late hours of the eve, Peter cannot help but have the sleepy sillies and whip books at his wives.

Sleepy Sillies by Humpcatter16 January 17, 2010

Hangover sillies 

The incontrollable silliness and/or giddiness that follows a night of excessive drinking.

Person 1: I just threw up in the dune grass.
Person 2: Fact - every second Christmas, an African child punches a baby.
Person 1: We have such a bad case of the hangover sillies.

Hangover sillies by Freckles17 August 24, 2011

Second Day Sillies 

The persistant distracted/unfocused feeling you get the day after smoking

Dude: Fuck all this homework, man. I'm not getting shit done today.
Man: What's wrong with you, dude?
Dude: I've just got mad second day sillies after that sesh last night.

Second Day Sillies by Markko October 12, 2013

Urban sillies 

Derived from 'urban silly', the singular form.

Someone who, under the illusion that he/she is an A-List Celebrity, walks around wearing the latest, (yet mismatched) designer clothes in an extremely snobby and pretentious manner.

Usually found in metropolitan business districts in most countries around the world.

(In a Starbucks in Manhattan) Just look at all these urban sillies with their polo shirts popped up at the collar and huge sunglasses!

Urban sillies by Suburbanite771 August 5, 2009

Sunday Sillies 

Uproarious laughter at otherwise unfunny situations or humor resulting from being hungover.

Well, the phrase "butt clump" was funny at brunch but I think we all had a case of the Sunday sillies.

Sunday Sillies by Kung Fu Jimmy October 11, 2017

Smacking sillies

Doing the deed, getting busy, hitting the nasty, getting jiggy, having sex, fucking.

Jenny and Me were smacking sillies like hyenas on crack last night.

Smacking sillies by karma-sutra May 8, 2012

Bitch Sillies 

A Bitch Silly or Bitch Sillies are player(s) in Fortnite who have a lot of skins including some from a battle pass uses the default skins to trick players into thinking they were noobs

Did I really just get killed by a No Skin?!?! They really are bitch sillies

Bitch Sillies by Switch & Play August 5, 2018