How do you spell faght?

"Faght" is not a standard English word. It's likely a misspelling of one of the following:

* Fight: This is the correct spelling of the word meaning "to engage in physical or verbal conflict."

* Fought: This is the past tense and past participle of "fight."

* Faugh: This is an interjection expressing disgust or disapproval.

If you can provide more context, I might be able to help you determine the intended word.