A dropdown menu is a toggleable menu that allows the user to choose one value from a predefined list:
<div class="fui-dropdown fui-btn fui-btn-primary">
<div>Drop Down</div>
<ul class="fui-dropdown-menu">
<li><a href="#!">Link 2</a></li>
<li><a href="#!">Link 3</a></li>
<li><a href="#!">Link 4</a></li>
</ul>
</div>