Cringeworthy - causing feelings of embarrassment or awkwardness. Example - "The play's cast was excellent but the dialogue was unforgivably cringeworthy."
You can't have your cake and eat it too - The proverb literally means "you cannot both possess your cake and eat it". Once the cake is eaten, it is gone. It can be used to say that one cannot or should not have or want more than one deserves or can handle, or that one cannot or should not try to have two incompatible things.
To heckle - to interrupt (a public speaker) with aggressive comments or abuse. Example - "He was booed and heckled when he tried to address the demonstrators."
Bailiff - someone who is instructed by a creditor to enforce a money debt or a fine. Example - "I need to return these books to the library before the bailiff come knocking."
Bob's your uncle - something that you say after you have explained how to do something, to emphasize that it will be simple and successful. Example - "Yousimplyputon thestainremover,leaveitforanhourandBob'syouruncle,thestain'sgone."
Horses for courses - it is important to choose suitable people for particular activities because everyone has different skills. Example - Ah well,horsesforcourses.Justbecause a plumbercanmendyourwashingmachine, it doesn'tfollowthat he canmendyourcar as well.
Swings and roundabouts - something that you say to describe a situation in which there are as many advantages as there are problems. Example - "If you make more money, you will have to pay more taxes. So, it's swings and roundabouts, really."