1. To extract something out of something or some place by using a pump or suction. In this usage, a noun or pronoun can be used between "pump" and "out." The doctors had to pump the alcohol out of his stomach before his body went into toxic shock. The rains have been so heavy that we've been pumping out our basement for days.

2. To empty something or some place of its contents by using the force of a vacuum to suck the contents out. In this usage, a noun or pronoun can be used between "pump" and "out." We'll have to pump the construction site out before we can lay down any concrete. They're pumping out the lab because a student accidentally created chlorine gas by mixing bleach with ammonia.

3. To flow or surge out of something freely, rapidly, and with force. Oil pumped out of the offshore well for days before a crew was able to fix the leak. Carbon dioxide pumps out of these plants all day, every day.

4. To create or generate copious amounts of something, especially continuously or at great length. Often used to imply the things are being created in a cheap, efficient manner, often reflected in their low quality. In this usage, a noun or pronoun can be used between "pump" and "out." He made a career of pumping out cheesy romance novels. People complain about how bad the movies in this series are, but people go out and see them every time the studio pumps another one out. This factory alone pumps out roughly 85,000 smartphones a month.