Allroy Sez is the debut album by the American punk rock band All, released in March 1988 through Cruz Records. Following the departure of singer Milo Aukerman from the Descendents, the remaining members—bassist Karl Alvarez, guitarist Stephen Egerton, and drummer Bill Stevenson—recruited singer Dave Smalley and changed the name of the band to All, which was both the title of the Descendents' 1987 album and a philosophical concept invented by Stevenson and friend Pat McCuistion in 1980. Allroy Sez introduced the character of Allroy, who would serve as a mascot for the band and be featured on many of their subsequent album covers.

The concept of "All" was invented by Descendents drummer Bill Stevenson and his friend Pat McCuistion during a fishing trip on Stevenson's boat Orca in 1980. According to Descendents singer Milo Aukerman, "While drinking all this coffee in the midst of catching mackerel they came up with the concept of All: doing the utmost, achieving the utmost. The more they got into it the more it turned into their own religion. It's partly humor, but it's also an outlook on how to conduct your life: to not settle for some, to always go for All." The concept became the title and theme of the Descendents' 1987 album All, which included the songs "All", "No, All!", and "All-O-Gistics" co-written by Stevenson and McCuistion. Stevenson elaborated on the philosophy:

I'm really into "ALL" and I've waited a long time to unleash the whole concept on people. And now I'm going to do it [...] It's just a way of thinking, in which there are extremes and there is this goal called "ALL". It's a way that I created in dealing with achievement and satisfaction and how the two relate. Basically just to avoid stagnation... going for "ALL" and never being satisfied and just wallowing in your own sameness.

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