Lesson
Here are some abbreviations you may hear from a native speaker:
Omfg: oh my fucking god
Lmao: laugh my ass off
Rofl: rolling on floor laughing
Stfu: shut the fuck up
Lol: laughing out loud
Gawd: god
Afk: away from keyboard
Asl: age, sex, location
Awol: Absent without official leave.
Boo: boyfriend/ girlfriend ( baby, dear, honey)
Bbw: big beautiful woman
Bfd: big fucking deal