Bogey

Neil put a nasal spray in Mark's nose and... tears galore! It was hard to understand what was happening, until I managed to get:

Mãe, o Pai estragou o macaco!!

Neil had just ruined a bogey...

Image by Jack Keely, the artist of Grossology. Here's a Fake Snot Recipe, just in case it is needed.

Definition
bogey (NOSE) UK
noun (US booger) SLANG
a piece of dried mucus from inside the nose
(from Cambridge Advanced Learner's Dictionary)