there's always barber college
a smart ass statement that lets the recipient know that you do not give a shit about their future.  They do not have the right temperment for the trade, and you have made the decision to terminate them.
Morgan, you're out of here.  What the fuck are you talkin about?  You don't have the right temperment for the trade.  What the fuck am I supposed to do?  Theres always barber college.