Here's an example of a children's cheerleader cheer that includes the word "knock":


I'm a Cougar from Cougar town
and only a Cougar can knock me down
If you don't like my apples,
don't shake my tree
'cause I'm a Cougar
Don't mess with me!

Submitted by: Baby boy; http://cheerleading.about.com/od/cheerschantsyells/a/cheers12.htm