This is the 634th most frequent Malay word.
terlebih
"Terlebih" means "excessive" or "too much" in English.
In this sentence, 'terlebih' is used to express the meaning of 'over' or 'excess' in relation to an action, which is eating.
Kami telah terlebih makan malam ini.
We overate tonight.
Here, 'terlebih' conveys the idea of 'preceding' or 'first' in an orderly manner.
Dia terlebih dahulu memberikan pendapatnya.
He gave his opinion beforehand.
In this example, 'terlebih' highlights an excessive degree of a quality, here referring to weight.