What Does 410 Mean Slang?

It’s a long story, but the short answer is that it means “four hundred ten” in American Sign Language.

Longer explanation:

It’s an ASL number system, which uses 10 fingers to represent numbers from 1-10 and 11-20. The hands are held up with the corresponding fingers touching each other so they look like pincers or claws. Numbers are signed on both palms simultaneously (i.e., one hand is stationary while the other moves). For numbers higher than 20, only one hand is used (the same goes for any sign that can be done with either hand) and it makes its way down the body as digits decrease until it reaches zero at the waistline. So 41 would look like the right hand starting at the shoulder, moving down to the waist.

Here’s a video of somebody signing 410:

The other answer is that the “410” in this instance is an incorrect interpretation of R. Kelly’s song “Feelin’ On Yo Booty” which features the lyrics “Go deep 410 representin’ that ass from Chicago.” The song was released in 1994, but the number didn’t become popular until its appearance on Dr. Dre’s album 2001 , which came out in 1999.