a[href=/username]:hover:after{
background: #333;
background-color: #fff;
border-color: #ddd;
border: 1px solid #ddd;
border-radius: 5px;
bottom: 102%;
color: #000000;
left: 0%;
padding: 5px 15px;
position: absolute;
z-index: 98;
width: auto;
content : Name (RP chars);
}