This is the 7709th most frequent Portuguese word.
pipoca
Popcorn.
Here, 'pipoca' refers to the traditional snack of popcorn in its specific variant of being sweet.
Eu adoro pipoca doce, é minha favorita!
I love sweet popcorn, it's my favorite!
Here, 'pipoca' is used metaphorically to describe the lively and energetic atmosphere, comparing it to the motion of popping popcorn.
A festa estava tão animada, parecia uma pipoca estourando.
The party was so lively, it seemed like popcorn popping.
In this context, 'pipoca' serves as a simile to describe a bouncing motion frequently associated with popcorn.