A former bodyguard for Britney Spears claims she sexually harassed him, but people connected with the singer are laughing at the allegation, saying the guy needs to man up.

The Sun is reporting that Fernando Flores is thinking about filing a multi-million dollar sexual harassment lawsuit against Brit, claiming she constantly came on to him and paraded naked.

We're told Flores was a short-timer, and had to know ... although Britney likes to buy clothes she doesn't necessarily wear all of them.

Britney famously has been photographed topless, and even more famously been photographed without panties. She constantly shuns clothes while at home, and we're told it has nothing to do with Flores.

Memba when Britney was picked up for her 5150 stint? Cops tried getting in her home for hours, as she paraded near a window in just panties. When officers finally subdued Brit, they tried covering her with a sweater ... and she screamed, "Don't cover me up. I'm f**king hot."