Fatima generalizes that all men are irresponsible players, cheaters, and liars. when it comes to men, fatima may be applying : negative beliefs about individuals based solely on their membership in a group.

The correct answer is stereotypes.
Stereotypes are such negative (and often false) beliefs about people based on particular members of that group. For example, there is a common stereotype that Asians are bad drivers; or that the French are always drunk; or that black people like eating chicken and watermelons - sometimes these stereotypes can even be offensive. Just because some members of the group behave a certain way doesn't mean all of them do, which is why Fatima is wrong in her beliefs.