Adjective / Bad
promiscuous - Lacking discretion or selectivity, especially in choosing relationships or associates; mixing or combining things randomly.

The character in the novel was portrayed as promiscuous, frequently engaging in relationships without commitment or emotional attachment.
ridiculous - Deserving or inviting mockery or laughter due to being absurd or unreasonable; outrageously unreasonable or exaggerated in a way that provokes disbelief.

They laughed when he made the ridiculous claim that he could lift a car by himself, but then lo and behold they watched him actually do it.