usually a term in vrchat and / or anime games.

it basically means they are underage and your basically fucked.
refer to a loli or lolicon. basic synonym

Anatidaephobia is defined as a pervasive, irrational fear that one is being watched by a duck. The anatidaephobic individual fears that no matter where they are or what they are doing, a duck watches.

Anatidaephobia is derived from the Greek word "anatidae", meaning ducks, geese or swans and "phobos" meaning fear.