the.com/wax paper

means Paper coated or infused with wax so it repels moisture and grease, used for wrapping food or lining pans — not to be confused with its heat-tolerant cousin, parchment paper.

from Exactly what it sounds like: paper run through or coated with hot wax, a trick that goes back to 19th-century efforts to waterproof paper for packaging. By the early 1900s manufacturers were producing it at scale for grocers and bakers, and it became a kitchen and lunchbox staple — wrapping sandwiches, lining cake tins — right up until parchment paper (which can actually survive an oven) started stealing its job.