Standing with the legs crossed at the calf-, knee-, or thigh-level.
This pose is named after actress Emma Watson, who has famously and frequently adopted this pose, usually at various award shows.
The character is usually deliberately presenting or shown in this pose (rather than, say, simply walking). Sometimes, they will have one hand on their hip.
Legs crossed at the ankles, as in post #91772, don't count. One leg hidden behind the other, as in post #2607422, also doesn't count.
This tag implicates crossed_legs (learn more).