[Idiom] What does go in for the kill means?

[moncsa001]

Dear teachers,

The whole text: An entertaniner tends to dress up in silly clothes and do silly things. If kids see an adult they know doing that, they will go in for the kill. When they see an adult they do not know doing it, they do not know how to react - and so they tend to be better behaved.

Thank you in advance for your help.

 

[emsr2d2]

In this context, it means that the child is likely to behave badly, make fun of the entertainer, maybe even completely disrupt the show.

 

[teechar]

In this case, it means that the kids will seize a perfect opportunity to mock the adult.

https://en.oxforddictionaries.com/definition/go_(or_move_in_or_close_in)_for_the_kill

Think of a predator pouncing on a prey.