Not grammar at all.  "Really" is an adverb and does not modify
"good."  And the word should be "well" anyway.

That is apart from the appalling attitude.

On 8 Apr 2003, at 15:15, Kate Troy
<[log in to unmask]> wrote:

In a message dated 4/8/2003 12:52:42 PM Eastern Daylight Time,
[log in to unmask] writes:

     But  I'm no linguist, &my knowledge of
     the history of the language is in bits &pieces

Your knowledge of everything is in tiny bits and pieces.

But, back to grammar:  Is the following good or bad grammar?

Our darling boys know how to kick ass really good.