I. perk 1 /pɜːk $ pɜːrk/ BrE AmE noun [countable usually plural]
[ Date: 1800-1900 ; Origin: perquisite ]
something that you get legally from your work in addition to your wages, such as goods, meals, or a car:
theatre tickets and other perks
perk of
the perks of working at a large law firm
I only eat here because it’s free – one of the perks of the job.
II. perk 2 BrE AmE verb [intransitive and transitive]
informal to ↑ percolate (3)
perk up phrasal verb informal
1 . to become more cheerful, active, and interested in what is happening around you, or to make someone feel this way:
She seemed kind of tired, but she perked up when Helen came over.
perk somebody ↔ up
There’s no doubt coffee perks you up.
2 . to become more active, more interesting, more attractive etc, or to make something do this
perk something ↔ up
A little chili will perk up the sauce.