Meaning:
“PUA” is the abbreviation for a “pickup artist,” referring to a person who practices finding, attracting and seducing sexual partners, and “男” means “male.” The use of “pickup” in this context, slang for making a casual acquaintance with a stranger in anticipation of sexual relations, was popularized by the 1970 book “How to Pick Up Girls” by Eric Weber and the 1987 semi-autobiographical romantic comedy “The Pickup Artist,” written and directed by James Toback. The term “pickup artist” is also associated with the seduction community, a heterosexual male subculture which strives to improve sexual and romantic abilities with women. These people receive mixed-to-negative responses from the press and general public, with many regarding both the practice and theory as immoral, sexist and ineffective.
Example:
A: 小丽最近怎么失魂落魄的？
Xiǎolì zuìjìn zěnme shīhún-luòpò de？
Why is Xiaoli not quite herself recently?
B: 她上个月交了个男朋友，没想到是个PUA男，刚分手了。
Tā shànggeyuè jiāo le ge nánpéngyou ，méixiǎngdào shì ge PUA nán ，gāng fēnshǒu le。
She dated a guy last month who turned out to be a pickup artist. She hasn’t recovered from the breakup.