1. An unexpected or abrupt claim, assertion, or statement made without prior warning or preparation
The defendant was caught off guard by the sudden allegation made during the trial.
O réu foi pego desprevenido pela alegação repentina feita durante o julgamento.
2. In legal context, an assertion or claim presented unexpectedly that may surprise the opposing party
The lawyer raised a sudden allegation of fraud that changed the course of the case.
O advogado levantou uma alegação repentina de fraude que mudou o rumo do caso.