Last-Minute Halloween Costume for Adults: Just Wear the Big Mouth Monster Onesie
The quick answer
The easiest last-minute Halloween costume for adults is a character onesie: one piece, no make-up, no props, and you're dressed in ten seconds. A big mouth monster onesie works especially well, because the face on the hood does all the costume work while the fleece keeps you warm all night.
Most costumes fail in one of three ways. They take hours to put together, they cost a fortune for one night, or they leave you freezing outside on 31 October. A monster onesie avoids all three.
Why a monster onesie makes a great Halloween costume
It takes zero effort
Pull it on, zip it up, put the hood up. That's the whole costume. No face paint to smudge, no wig to itch, no accessories to lose.
It's warm enough for a cold October night
Trick-or-treating with kids, queuing outside a bar, standing round a bonfire: Halloween happens outdoors and late. The Bigslumpy is made from heavyweight, deep-pile fleece, so you stay warm while everyone in thin polyester costumes shivers.
It goes over your clothes
The oversized cut goes straight over jeans and a jumper. Take it off when you get inside and you're still dressed for the party.
You'll actually wear it again
Most costumes go in a bag after one night. A fleece onesie becomes your sofa outfit for the rest of winter, which makes it far better value.
It gets a reaction
The big mouth face is silly on purpose. People laugh, take photos and ask where you got it. At a party, that's the point.
5 easy ways to style it for Halloween
- The classic monster. Hood up, nothing else. Pull faces in photos.
- Monster family. Match colours or mix them. With six colours (yellow, purple, black, orange, blue and green), everyone gets their own monster.
- Couples costume. Two monsters, two colours. Orange and black are the obvious Halloween pair.
- Trick-or-treat host. Answer the door to kids in it. Warm for you, funny for them.
- Monster movie night. Not going out? Wear it for a horror-film marathon on the sofa.
Which colour is most Halloween?
|
Colour |
Halloween vibe |
|---|---|
|
Orange |
Pumpkin, the classic pick |
|
Black |
Spooky, pairs with any other colour |
|
Purple |
Witchy |
|
Green |
Swamp monster |
|
Yellow |
Bright, great in photos |
|
Blue |
Friendly monster |
Will it arrive in time?
Order early in October to be safe. Delivery is free worldwide, and you can track your order once it ships. Check the shipping policy for delivery times to your country.
FAQ
What is the easiest Halloween costume for adults?
A character onesie. It is one piece, needs no make-up or props, and takes seconds to put on. A monster onesie with a face on the hood is instantly recognisable as a costume.
What is a warm Halloween costume?
A heavyweight fleece onesie. It covers you from hood to ankle and goes over your clothes, so you stay warm outside on a cold October night.
Is a big mouth monster onesie a good couples costume?
Yes. Two onesies in different colours make a simple, funny couples or group costume, and it works for any number of people.
Can I wear a onesie to a Halloween party over my clothes?
Yes, if it is cut oversized. The Bigslumpy is designed to go over what you already have on.
Your monster is waiting
Skip the costume shop. Get The Bigslumpy, wear it on 31 October, and keep wearing it all winter.