double-dip

(informal) To dip a piece of food (e.g. a chip) into a communal sauce container after already having taken a bite of the food.

(informal) To be illegitimately compensated a second time for the same activity.

(informal) To draw a government pension or benefit for one job while also working in the government at another job, or to draw two pensions at the same time as a result of reaching the retirement criteria twice for the same entity.

(television, film) To re-release a movie or TV series, sometimes as a compilation or with additional features.

(US, finance) To use a single debt instrument to obtain interest tax expense (and therefore a lower tax base) in two or more tax jurisdictions.

(softball) To defeat a team twice in the finals.

(higher education) To enroll in a single class which will fulfill two different requirements of a course of study.

(video games) To buy the same game twice, especially on different platforms.