| Acronym | Meaning |
| AISI | As I See It |
| AITR | Adult In The Room |
| AKA | Also Known As |
| ALAP | As Late As Possible |
| ALCON | All Concerned |
| ALLWANISU | All I Want Is You |
| ALOL | Actually Laughing Out Loud |
| ALOTBSOL | Always Look On The Bright Side Of Life |
| ALTG | Act Locally, Think Globally |
| AMAP | As Many / Much As Possible |
| AMBW | All My Best Wishes |
| AMF | Adios Mother F*cker |
| AML | All My Love |
| AMRMTYFTS | All My Roommates Thank You For The Show |
| ANFAWFOS | And Now For A Word From Our Sponsor |
| ANFSCD | And Now For Something Completely Different |
| AOAS | All Of A Sudden |
| AOB | Abuse Of Bandwidth |
| AP | Apple Pie |
| AS | Ape Sh*t |
| AS | Another Subject |
| ASAFP | As Soon As F*cking Possible |
| ASAMOF | As A Matter Of Fact |
| ASAP | As Soon As Possible |
| ASAYGT | As Soon As You Get This |
| ASL | Age/Sex/Location |
| ASLMH | Age/Sex/Location/Music/Hobbies |
| ATAB | Ain't That A Bitch |
| ATB | All The Best |
| ATC | Any Two Cards |
| ATSL | Along The Same Line |
| ATST | At The Same Time |
| ATW | All The Web |
| ATW | Around The Web |
| ATW | At The Weekend |
| ATWD | Agree That We Disagree |
| AWC | After A While, Crocodile |
| AWGTHTGTTA | Are We Going To Have To Go Through This Again |
| AWHFY | Are We Having Fun Yet? |
| AWLTP | Avoiding Work Like The Plague |
| AWNIAC | All We Need Is Another Chair |
| AWOL | Absent Without Leave |
| AWTTW | A Word To The Wise |
| AYC | Aren't You Clever |
| AYC | Aren't You Cheeky |
| AYCE | All You Can Eat |
| AYK | As You Know |
| AYOR | At Your Own Risk |
| AYSOS | Are You Stupid Or Something |
| AYTMTB | And You're Telling Me This Because |