Men “The Master” Nguyen is certainly one of the least reputable players in poker today.
After an argument with Vanessa Selbst in the WSOP Pot-Limit Omaha Championship.

According to notes posted by WSOP.com, the controversy arose when Nguyen and Selbst were arguing over a past hand where she supposedly sucked him out. They posted the following excerpt:

Nguyen brought up a hand that apparently occurred between them in a Pot-Limit Omaha event in the past where, according to Nguyen.
Selbst was a slight underdog and busted him.
Nguyen then told Selbst not to bring the hand up and Selbst said that she wasn’t the one who brought it up in the first place.

Robert Mizrachi was at the table to Selbst’s right and defended her, saying something to the effect of treating her with some respect.

Nguyen then turned to him and said, “She is not a woman,” gesturing towards Selbst as if to point out for Mizrachi to take a look at her.

Selbst, obviously offended and shocked by the comment, turned to Nguyen and said, “You’re an a****le.”

“I know I’m an a****le,” Nguyen said.

The spat didn’t end there though, and the two continued arguing until Nguyen reportedly ‘sat back in his seat behind his beer and went on to the next hand.
In the following hand, Nguyen was eliminated when Mike McDonald hit a flush to beat Men’s straight.
Selbst made a comment about him busting out, and their exchange continued until Nguyen was asked to leave by the floor.

Nguyen has been known to get drunk at many tournaments, be disrespectful to dealers, and has even flipped the bird to WSOP audiences.
What a Class Act-Not!