Someone who doesn't know what they are doing on AOL's Instant Messaging program. They don't get the features and generally are just confused about AIM.

Used to describe (generally female) imagery that's suggestive, but in a PG-13 sense rather than an R or above sense.

Someone who:

a) can't type more than 10 words per minute
b) can't figure out how to join a chat or accept a file when the invitation is right in front of them

For these reasons and others, it is impossible to carry on a conversation with an AIM tard.