A gag where interactions between men are referred to as "Yuri" or "lesbian", be it in dialogue, narration, or anything else, typically due to displaying gentle affection or otherwise behaving in ways more stereotypically associated with Yuri than Yaoi.
Although the interactions will often quite literally look like yuri due to Crossdressing (Mtf) or being traps, it is not a requirement, and even masculine men can apply.