A macro fetish is a fixation on or desire for sexual partners who are much larger than oneself. In the case of a macro fetish, the objects of attraction might be very large like giants or very large as in obese. The subject of macro fetish is popular in the realms of anime and fantasy.
More About Macro Fetish
While similar to macrophilia (a fetish for giants), a macro fetish is different in that it does involve the active sexual attraction to and desire to engage with larger partners while macrophilia often centers around fantasies of giants, being unnaturally smaller than one’s partner, and being at their mercy.