what do they mean on twitter with this .....?

[Allyson]

this is how a conversation goes (i do understand the first bit but what do they mean with ''46 leggo'' or ''85 wgu ?'' can someone please explain it to me ?) :

* 20x20 ?? wwyba ?? *
* 85 wbu *
* 46. leggo *

[Richard]

they're aliens...

[James]

It is an undecipherable language called negrospeak. Only black people can understand it. They uses the same numbers and letters that are used in the English language, but in strange and confusing ways. Ask your village negro for translation tips.