Pearl Pebbles Slaghoople was a fictional character on the animated TV show The Flintstones. She was the mother of Wilma Pebbles Slaghoople Flinstone, who is married to Fred Flintstone In the original series, she portrayed Fred's stereotypical antagonistic mother-in-law, acting as a nagging irritant. Her appearance was similar to Wilma's although Pearl was noticeably heavier, similar in build to the men of Bedrock rather than the more shapely Wilma and Betty.

It has been stated that Pearl has four children: Jerry, Wilma and two twin sisters.

In the first few seasons of The Flintstones, Wilma's maiden name was said to be "Pebbles." How Pearl was a Slaghoople, and yet Wilma's maiden name was Pebbles, was never explained. Possibilities include Pearl divorcing Wilma's father, Mr. Pebbles, and later marrying a Mr. Slaghoople, Pearl herself was using her maiden name, Wilma was using her middle name (on account that "Pebbles" is easier to say), or that Hanna-Barbera purposefully changed it to avoid confusion with Pebbles Flintstone. Another possibility is that Peal Slaghoople merely kept her maiden name upon marriage. This makes sense as she did represent a person of strong feminine qualities. More logicaly is that Pearl married Mr. Slaghoople after being widowed by Mr. Pebbles (it is stated that Wilma's father has passed way) and he adpoted her daughter, Wilma. Hanna-Barbera, however, merely attributes the discrepancy to a continuity error. Later spinoffs would retroactively assign Wilma's maiden name as "Slaghoople."

In the movies, Pearl Slaghoople was played by Elizabeth Taylor and Joan Collins.

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