I got a warning that said, "You have received a verbal warning for spamming. Spamming includes excessive smilies/emoticons, repeated one-word messages, repeated identical messages, making multiple forum posts about the same topic, and "bumping." but I don't recall doing anything like that. Can anyone help me out on what it means or anything similar?
I guess you have to file a ticket and ask them, they can look it up for you ^^
If you have a question about a warning, it's always best to file a ticket and ask staff.
ETA: Verbals aren't really a big deal though. The ones you have to worry about are official warnings.
Looking at your posting history (sorry to creep), it's most likely because you created 2 topics for looking for 1 week GAs. The one that you created in the wrong forum was moved to the right forum, and then you created another one in that same forum, so the latter one was locked, and you received a warning. :)
Though it's best to check with a ticket, heh.