This is the 1273rd most frequent Spanish word.
extra
"Extra" in Spanish means "extra" or "additional" in English.
Here, 'extra' is used colloquially to mean overly dramatic or excessively detailed in behavior.
Ella siempre fue muy extra en sus manías para organizar todo.
She was always very extra in her habits to organize everything.
In this sentence, 'extra' functions as an adjective describing an additional quantity of cheese.
Pidió extra queso en su pizza porque le gusta mucho.
He asked for extra cheese on his pizza because he loves it.
'Extra' here works as an adjective indicating surplus or additional money.