Bend someone’s ear usually means try to persuade them.

Pillow talk takes place in bed.  In UK English pillows are specifically for heads to rest on in bed.  US English has widened the meaning to include cushions, which are now fashionable adornments on beds as well as being useful on armchairs and sofas.

Rabbiting on is a slang expression about talking at length.  I’ve never heard a rabbit make a noise, have you?

Banging on is another slang expression for going on about something.  Nowadays many people say “went” instead of “said”.  It is an extension of the same idea, although it is disliked by purists.

To put it bluntly or to be blunt means to say what you mean without leaving any room for doubt or ambiguity.

Stuff and nonsense is associated with those dealing with young children.

Piffle and tosh and Balderdash are two old-fashioned ways of saying Nonsense.

Well, I never (did)! expresses surprise.

What do you know? has various meanings depending on the emphasis. WHAT do you KNOW? is an expression of surprise. What do YOU know? is possibly a put-down.

I won’t kowtow to anyone.  This is derived from Chinese and means not submitting to another person’s superiority.

When all’s said and done…
…may introduce a summary of someone’s understanding of a situation.

Having the last word can become a habit.

I’ll tell you what…
…may introduce a plan.

Go off the deep end means lose one’s temper (usually verbally).

To vouchsafe information is to tell someone something.  The verb vouch (for) means guarantee and  now there are all sorts of money-saving vouchers or coupons.

To pull something off means to succeed.

So long! is an informal way of saying Goodbye!

Hang on his every word means listen attentively.  (Luke 19:47-48)