The verb to perk or to perk up means to become more cheerful, energetic or interesting. You might perk up after drinking a cup of coffee, for example. Informally the verb to perk can be used in place of or as an abbreviation of percolate. As a noun, a perk is a benefit or advantage to which you are entitled because of your job or work. A perk can also refer to an advantage or benefit that arises or comes out of a particular situation. In a colloquial context, a perk can refer to a coffee percolator.

1. Being so close to some of the world's greatest theatres is certainly a big perk of living in the heart of London, though the cost of renting a place there is substantial.
2. I always use my perk to make coffee in the morning.
3. Seeing my nieces and nephews at the weekend always perks me up.
4. My friend has been having a hard time at work recently so I sent her some flowers in the hope of giving her a bit of a perk.

1. A company car, private medical insurance and a phone are just some of the perks that come with my new job. I'm lucky that the firm treat their staff very well.
2. One of the perks of working in the aviation industry is that you get a certain number of free flights a year to anywhere in the world.