Used to describe something(or someone) completely ordinary with a sense of triteness and may be inferior in quality as well.
Using the word "awesome" to describe everything whether good or bad could be called dead common.
Cayman Crocs or any facsimile of them could also be called dead common.
A person who goes about saying awesome while wearing Crocs is definitely dead common.
"Look at that girl's attire!"
"Are you referring to the one wearing pedal pushers and Crocs?"
"Yes, isn't that just dead common?!"