What does Huck pretend to be when he is caught pretending to be a girl?

From the text:

So I said it wouldn’t be no use to try to play it any longer, and I would just make a clean breast and tell her everything, but she musn’t go back on her promise. Then I told her my father and mother was dead, and the law had bound me out to a mean old farmer in the country thirty mile back from the river, and he treated me so bad I couldn’t stand it no longer; he went away to be gone a couple of days, and so I took my chance and stole some of his daughter’s old clothes and cleared out, and I had been three nights coming the thirty miles. I traveled nights, and hid daytimes and slept, and the bag of bread and meat I carried from home lasted me all the way, and I had a-plenty. I said I believed my uncle Abner Moore would take care of me, and so that was why I struck out for this town of Goshen.