Silento, who had a huge hit as a teenager with "Watch Me (Whip/Nae Nae)", is in big trouble after trying to find his girlfriend, hatchet-in-hand, but walking into the wrong Santa Ana, California house last weekend

Now 22, Silento entered the home with his weapon, scaring the crap out of the residents.  One of them physically confronted him and was able to disarm the rapper.  Shortly after, Silento's friend arrived and told him he had gone to the wrong house if he wanted to find his girl and the two fled the scene.

The police were able to track Silento down. He's facing two felony counts of assault with a deadly weapon and is being held on a 105K bond.

No word on what his girl did to be so recklessly pursued.  But if she wants to catch up with him, she knows where to find him.