Mamuna (en. To begin)

/maˈmuna/

Slang Meanings

Crazy or foolish
My classmate is such a mamuna, that's why he always gets embarrassed.
Ang mamuna ng kaklase ko, kaya lagi siyang napapahiya.
Dumb or not knowledgeable
Don't be a mamuna, study first before speaking!
Huwag kang mamuna, mag-aral ka muna bago magsalita!