"Possible expulsion" means that someone could be forced to leave or be removed from a place or organization, such as a school or a club. Full definition
He faced possible expulsion from the Legislature amid sexual harassment allegations. (newyork.cbslocal.com)
Disgraced mogul Harvey Weinstein, who is facing possible expulsion from the Academy of Motion Picture Arts and Sciences on Saturday, could also find his membership in the Producers Guild of America revoked before that day is over. (hollywoodreporter.com)
A Republican state senator faces possible expulsion for sexual harassment. (politico.com)