Add the following function to your .bashrc file...
  # Function to implement a GUI style Trash Bin
  function trash { mv $1 ~/trash/$1; }                                                                                    
  export -f trash

Next, $ mkdir ~/trash to create your bin.

Then, $ exec bash to begin a new shell that
includes the change.

Finally, test the function with...
  $ touch testtrash
  $ trash testtrash
  $ ls ~/trash

And you're DONE!