In the context of Thomas MacDonagh's poem "John-John," "Maggie men" represents a category of people who participate in fairs, likely performing tricks or selling goods. The term evokes a sense of community among those who live outside conventional societal norms, contrasting with the more stable lives of the "thimble men" and others mentioned. This highlights the poem's themes of longing and the tension between a desire for stability and the allure of a more free-spirited lifestyle.

The term "Maggie men" likely derives from a colloquial or regional Dialect, reflecting the social fabric of early 20th-century Ireland where fairs were central to community life. It captures the essence of itinerant culture, often viewed with a mix of fascination and disdain. Related terms might include "tinker men" or "thimble men," which also denote specific roles within the same social milieu. Understanding these terms can enhance the appreciation of the poem's exploration of identity and societal expectations.