cogon grass

Kugon is a tall, perennial grass used in thatching.

Its scientific name is Imperata cylindrica.

The English word 'cogon' is from the Spanish cogón, which is from the Tagalog word kugon.

ningas-kugon / ningas kugon
"flaming cogon grass" = quickly going up in flames

Ningas kugon
refers to the Filipino cultural trait of very enthusiastically starting things, but then quickly losing enthusiasm soon after.

Ano ang ningas kugon?
What is ningas-kugon?

Ito ay kung sinisimulan ang isang gawain ngunit hindi tinatapos.
This is when a task is started and then is not finished.

The Tagalog word for 'grass' is damo.