The story
From almond + mom, in reference to the healthy foods such as almonds which they promote. Popularised on social media service TikTok in late 2022 and early 2023; it emerged in response to a viral video posted on the service that featured a clip from the American reality television series The Real Housewives of Beverly Hills in which model Yolanda Hadid instructs her daughter Gigi to eat almonds because she feels weak.
Etymology from Wiktionary, CC BY-SA 4.0.