It's Not Opposite Day

1 person says something and the next person says something like the opposite.
Example:
...
No.
Yes.
(The next person who says the opposite thing adds one more thing.)
Shirt.
Pants.
Just like that! I'll start, what is the opposite of...
Squares!
Example:
...
No.
Yes.
(The next person who says the opposite thing adds one more thing.)
Shirt.
Pants.
Just like that! I'll start, what is the opposite of...
Squares!