I agree Fag's lines are among the funniest:

And in tenderness to my character, if your honour could bring in the chairmen and waiters, I sahall esteem it as an obligation; for thought I never scriple a lie to serve my master, yet it hurts one's conscience, to be found out

Come, come, Lucy, here's no one by - so a little less simplicity, with a grain or two more sincerity, if you please.

How! What tastes some people have!

He's funny and smarter than most think!

The scene between Jack & his father is also funny. You can hear Sir Anthony flying into an increasing rage as he says:

Zounds! sirrah! the lady shall be as ugly as I choose: she shall have a hump on each shoulder; she shall be as crooked as the Crescent; her one eye shall roll like the bull's in Cox's museum - she shall have skin like a mummy, . . .

And

Can't you be cool, like me? What the devil good can passion do? Passion is of no service, you impudent, insolent, overbearing reprobate! . . . don't enter the same hemisphere with me! don't dare to breathe the same air, or use the same light with me; but get an atmospher and a sun of your own! . . . I'll disown you, I'll disinherit you, I'll unget you! And damn me, if ever I call you Jack again!

And Jack's response: