Last But Least
Like Last But not Least, except the last thing done it the least important.
The cop had done 2 things already that day, he had arrested a murderer and arrested a rapist. And the last but least thing he had to do was quieten down an old woman's next door neibourghs.
last but not least
A term used to describe something last usually on lists but are not the worst
...And last but not least (insert subject here)