Repartee is saying on the instant what you didn't say until the next
morning.
Among the members of a working gang on a certain railroad was an
Irishman who claimed to be very good at figures. The boss, thinking that
he would get ahead of Pat, said: "Say, Pat, how many shirts can you get
out of a yard?"
"That depends," answered Pat, "on whose yard you get into."
A middle-aged farmer accosted a serious-faced youth outside the Grand
Central Station in New York the other day.
"Young man," he said, plucking his sleeve, "I wanter go to Central
Park."
The youth seemed lost in consideration for a moment.
"Well," he said finally, "you may just this once. But I don't want you
ever, _ever_ to ask me again."