at so meaning

[American slang]
being argumentative or contentious with someone.
  She is always at him about something.
  I wish you weren't at me all the time over finances.

• and so:    Adverb: and soSubs ...
• and so on:    Adverb: and so onC ...
• if so:    [American slang]if ...

Examples

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1. what are you looking at so intently?
2. write on the form that you stayed so many nights at so much per night.
3. pitt stooped and picked them up, amazed at so much wealth.
4. he was rejoiced at so early an opportunity of distinguishing his faith in his new sect.
5. the next street, too, had its passengers inclined to make holiday remarks at so unusual a pair.