Just because they are ugly fat pigs that doesn't mean they are necessarily immune from harassment, might not be sexual harassment although men's taste in women can be quite diverse; they might still receive harassment in the forms of taunting, bullying, jeering and etc. and according to the long list of definitions that
@Sig has posted, they all qualify as sexual harassment. Besides when all else fails, this catch-all definition of "discomfort to the point of not able to work" will certainly nail the guy for sexual harassment.
Conclusion: Ugly fat b****es are not safe.