A person who hangs all over everyone, is a drip, and generally makes the place go sour if left unattended to immediately.
"Man, that girl is just a wet towel. She needs to get a life!
A friend who you always want to have around to make stinky situations all better. Crucial for those who are prone to awkward situations or depression.
"Hunny, you're my febreeze! You always make everything better!"