Short name fore "I am at home". The "@" stands for the "at" and "H" for "home".
I know, we're becoming lazie and MORE MORE lazier to write simple phrases.
A : Hey wut up, dog?
B : Nting really.. jst chillin'
A : k, cud ya com n' meet me at da park?
B : Nope!
A : Y, were r ya?
B : @h havin sex wid my girl, g2g
A : Luky... I'm commin 2 watvh, lmao
B : Peace, nw go, it' gettin really hot!