It's a contracted, or shortened, form of "them" that's used in conversation, much in the same way that "gonna" is often used to mean "going to".  In your quote, there should be a space, so: "Let's kick 'em."  The apostrophe is to show a contraction.

So yes, it's correct to use, and often used in conversation.  However, if you are writing it, it should only be used to directly quote someone who has said it.

what is the difference between 'em and them
Currently I'm working on a navigation that doesn't take up too much screen real-estate. I came up with a pseudo off-canvas navigation with stacked menus.

A user can assign nodes to a product. This is the current state of the wireframe; user chose Add nodes. Now he want's to manually search for a specific node 1 (1. Browse Nodes in wireframe). The user now can select a node to add to product 2 or go 1 level deeper into the navigation 3. and 4.. If you click on a node-link the children off that node will slide-in and stack on top of the current menu. There is also a back option to parent (second wireframe).

I deliberately chose checkboxes, links and button as elements because that's their purpose; I wireframed there functionality not a design-solution. Normally I like selecting text/label also checks a checkbox, but now the label is a link too. A user could a) select that node to add to product, Or b) select node to navigate to children of that node.





I could argue if it makes sense that a node will act is a leaf and a branch. A don't have any real data about how customers assign nodes. I can't wait for this input. Currently functionality of the system is that a node could be a leaf and a branch. So asking real users is no option. Maybe in the future (months from now).

How to convert this into an intuitive navigation?
