a walrus who has typically lost a bucket, is searching for a bucket, or has acquired a bucket. mostly found in tagged pictures associated with lolcats.
Who stole that lolrus' bucket? Now he'll have to use a kitteh to find a new one.
A woman who misrepresents herself on the internet, via pictures or misleading statements, to meet men. This doesn't just apply to being ugly, though that is the most common cover-up.
She looked hot in her pictures, but when we metIRL she was a lolrus!