| Abbreviation | Definition |
|---|---|
| ASUS | After Sales U S*** |
| AT | All That |
| AT | Alt.Tasteless |
| AT | Alternative Thread |
| AT | Art Trade |
| ATA | Advanced Technology Attachment |
| ATB | All The Best |
| ATBB | All Things Bright and Beautiful |
| ATBQ | Answer The Bloody Question |
| ATBT | Actions To Be Taken |
| ATC | Anime Topic Chat |
| ATC | Any to Come |
| ATC | Awesome Thinking Crazy |
| ATDNSSHINC | Any Time Day or Night Sundays and Holidays Included |
| ATE | After The Event |
| ATEOTD | At The End Of The Day |
| ATF | A** To the Floor |
| ATFM | All Time Favorite Movie |
| ATG | A** To Grass |
| ATG | At The Gym |