Yukkuris are invading a house (usually a human's). Can also be used when yukkuri are invading a general human property- e.g. a farm, or an office.
Often done either to steal food or more commonly to claim said house as their own house.
Generally done by shithead and dumbass yukkuris, it's often depicted as stray or wild yukkuris entering someone's home through breaking a glass door or sneaking through an open door and then declaring "this will be species's easy place!". Yukkuris believe that if they perform a home declaration and nobody objects then it's their house (although for shitheads even if someone objects they'll usually just attack). They then proceed to wreck the place, shitting and peeing all over the spot and eating any food within reach. Of course this never ends well once the human owner returns.
For a human, a simple and cheap way to prevent this is by using a scarecrow. More expensive countermeasures include owning a predator, hunter or fighter yukkuri as a pet (or just owning a non yukkuri pet like a cat or dog) or to reinforce the windows and doors with stronger glass.
This tag can also be used when a yukkuri invade another yukkuri's home. Again, this is mostly done by shitheads who can't bother finding their own house but it's also done by raper alices and predator yukkuris. Unlike a human home invasion, this one is generally more successful for the invader.