Deadass. An expression typically used to add more enthusiasm to a sentence. Most often used in text messages since you’re a lazy piece of shit who can’t write.
Make yourself look cool but stupid at the same time.
John: Yo u saw that fight last night?
Doe: Nah what happened?
John: Anthony beat Andrew's ass and shaniqua was geeking
Doe: No way
John: I'm being da, everyone was buggin