function move_to_trash () {
        unset rm;
        cp -v "$@" "/home/`whoami`/backup/" &&  rm "$@";
}


alias rm='move_to_trash'

'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'
'file1' -> '/home/dorchester/backup/file1'