Milking

verb

1. To express milk from (a mammal, especially a cow).

   "The farmer milked his cows."

2. To draw (milk) from the breasts or udder.

   "to milk wholesome milk from healthy cows"

3. To express any liquid (from any creature).
4. To make excessive use of (a particular point in speech or writing, a source of funds, etc.); to exploit; to take advantage of (something).

   "When the audience began laughing, the comedian milked the joke for more laughs."

5. (of an electrical storage battery) To give off small gas bubbles during the final part of the charging operation.