Learn English – Is “embiggen” considered a formal or slang word

Whatsoever is perfectly fine if used for emphasis. For example, if you were reviewing a book about desserts, you might say:

The authors make no mention about ice cream.

This is a plain statement, just reporting the facts. Nothing wrong with that. But you might want to go at the matter a little harder.

The authors make no mention whatsoever about ice cream.

This is emphatic, emphasizing the writer's disbelief or disappointment that the authors did not mention ice cream. Probably this writer had hoped a written work about dessert would at least mention ice cream.

There are other constructions you could use for emphasis as well.

The authors make no mention at all about ice cream.

The authors make no mention whatever about ice cream.

The authors make no mention in 547 pages about ice cream.

And so on. The point is, sometimes extra words are fine to use when making a point. And, yes, I like ice cream and would be indignant if a book about dessert were to leave it out.

It is an alternative spelling for biatch. There is little or not much difference in pronunciation. Note that, since the stress is on the first syllable, the second syllable may be an intermediate sound between 'a' and 'o', perhaps a schwa.

Here is the definition (and pronunciation) from en.wiktionary.org

biatch

Pronunciation

(US) IPA(key): /bi.ˈɑtʃ/

Noun

biatch (plural biatches)

1.(pejorative, slang, gangsta) Alternative form of bitch  

Quotation Natika Waldon, Urban Affairs, page 197: “Fuck you, you son of a bitch!” Dana screamed, trying to cover herself. “Fuck your mamma, biatch!” he said as he kicked his door shut.

Note (chasly)

If the 'o' sound were to be pronounced fully then the pronunciation would be /bi.ˈotʃ/.

If you want to hear the word then my guess is that you need to listen to some gangsta rap. (never thought I'd recommend that to anybody!)