This is the 6927th most frequent Polish word.
glapa
"Glapa" is Polish slang for a bald head or, less commonly, a nose.
In this sentence, 'glapa' refers to a woodpecker, which is a type of bird.
Glapa usiadł na dachu, oglądając otoczenie.
The woodpecker perched on the roof, observing the surroundings.
Here, 'glapa' colloquially means a hat or cap, often used informally to describe headgear.
Chłopak miał na głowie starą glapę pełną dziur.
The boy was wearing an old cap full of holes on his head.
In this context, 'glapa' is used as a colloquial term of endearment or mild reproach, similar to calling someone 'smarty-pants'.