The more the merrier.
The more people in attendance, the better it will be.
Trim the tree.
To decorate a Christmas tree, typically with lights and ornaments.
Skating on thin ice.
Doing something that is dangerous and involves a lot of risk.
Holiday spirit.
The positive feeling people experience around holiday seasons.
The proof is in the pudding.
The success of something can only be judged by testing or using it.
Good things come in small packages.
We should not judge a package by its size.
Christmas came early this year.
When something really good happens but it was completely unexpected.
Don’t be left out in the cold.
To be left out in the cold can mean to be forgotten or left out.
Deck the halls.
Decorate one’s home with Christmas decorations.
A white Christmas.
Christmas with snow on the ground.
Lit up like a Christmas tree.
Someone is overly dressed.
A Christmas miracle.
Something highly unlikely but wonderful.
Snowball effect.
A situation in which something increases in size or importance at a faster and faster rate.