vaväpartisiippiperheeseen
The term "vaväpartisiippiperheeseen" is a Finnish neologism that can be broken down into its constituent parts to understand its meaning. "Vavä" is a playful, often nonsensical, sound often used in children's language or to create a lighthearted effect. "Partisiippi" is a playful or slightly informal term that might allude to something small, perhaps a tiny piece or a small gathering. "Perheeseen" is the illative case of "perhe," meaning "family," indicating a movement into or within a family context.
Therefore, "vaväpartisiippiperheeseen" can be interpreted as a whimsical or affectionate term for a very small, perhaps