To masturbate rigorously to eventually force ejaculation.
Its first known use was by Jane Austen in Pride and Prejudice:
Sir William Lucas: Oh, Miss Eliza, why are you not dancing? - Mr. Darcy, allow me to present this young lady to you as a very desirable partner. You cannot refuse to dance, I am sure, when so much beauty is before you.
Elizabeth Bennet: Indeed, Sir, I have not the least intention of dancing. Please don't suppose that I moved this way in order to beg for a partner.
Mr. Darcy: I would be very happy if you'd do me the honour of dancing with me, Miss Bennet.
Elizabeth Bennet: Thank you, but excuse me, I am not inclined to dance.
Mr Darcy: Miss Bennet, please then do me the honour of walking you to the study, allowing me to wank
over your shadow and to cast jism
all over your tits
Elizabeth Bennet: Mr Darcy, that is a most favourable suggestion!