Animorphs
Definition
A science fantasy book series for young adults, written primarily by K.A. Applegate (under the pseudonym Katherine Applegate) and her husband Michael Grant, published from 1996 to 2001, spanning 54 main novels and several spin-offs. The story follows a group of teenagers who acquire the ability to 'morph' into any animal they touch, using alien Andalite technology to secretly battle the parasitic alien Yeerks invading Earth.
In the context of the series, a portmanteau of 'animal' and 'morph,' referring to humans or characters capable of transforming into animals.
Examples
After binge-reading Animorphs as a kid, I tried touching my dog and yelling 'morph!'—spoiler: I just got fur on my shirt.
Animorphs fans know the real horror isn't the Yeerks, it's the two-hour time limit mid-morph during gym class.
If Animorphs were real, I'd morph into a sloth for every Monday meeting and blame it on 'alien tech glitches.'
Debating which Animorphs book had the most twisted plot twist is my party's idea of a wild night in.