May-Weather 

American professional boxer. He is the son of Floyd Mayweather, Sr., a former welterweight boxing contender.

From July 18, 2005 through June 2, 2008 he was rated by The Ring magazine as the number-one pound for pound boxer in the world. Mayweather has won six world boxing championships in five different weight classes; he is the former WBC welterweight champion, a title he vacated upon his retirement. He was named Ring Magazine Fighter of the Year in 1998 and 2007. He is currently ranked number 2 pound for pound fighter.

Now for the facts:

He ended up being a pussy and declined from fighting Manny Pacquiao. So, he has created "fail expectations" for nearly 80% of the world awaiting this bout.

The term is used for relating to high expectations that diminished immediately.

The blizzard in New Jersey wasn't that bad. It was may-weather.

May-Weather by Passion with One S February 6, 2010

1-2 Mayweather 

The act of fighting/punching someone. Often followed with the 3-4 McGregor. Popularized by the NELK boys.

Buddy was talkin' shit, had to give him the 1-2 Mayweather

1-2 Mayweather by Miguel Viper April 23, 2018

Mayweather Exception 

A loophole that protects a very narrow subset of athletes and celebrities from the typical criticism, judgement, backlash most would experience following transgressions such as: racially insensitive or anti-LGBT comments, criminal activity, drug or alcohol abuse, rampant promiscuity, flaunting/squandering of wealth, involvement in altercations, etc.

This loophole is granted only to select few individuals who have, over time, built such a negative and illustrious resume of actions, behaviors, statements, etc. that they are seen as too far gone and disconnected, unaffected by backlash, insane or delusional, or not worth attacking

Examples include: Floyd Mayweather Jr., Charlie Sheen, Eminem, Lenny Dykstra, Courtney Love

(coined by sportswriter/blogger named Jeremy Morris in 2017)

Floyd Mayweather yet again showed us all why he’s the ultimate Mayweather Exception guy with that response. He’s clearly never heard of the MeToo movement but managed to answer the question by talking about a couple of his million dollar cars.

Courtney Love was hammered trying to parallel park on the sidewalk on TMZ but she’s definitely earned the Mayweather Exception as far as drinking/drug use so no ones really surprised. Imagine if Taylor Swift was drunk driving on TMZ. Twitter would crash.

Mayweather Exception by Ryan O’Connell August 15, 2018

pulling a mayweather 

A term used when someone pulls a "cheap shot". Derived in the back alleys of McAllen Texas, referring to the fight Mayweather vs. Ortiz, when Mayweather pulled a cheap shot. Hence, pulling a mayweather.

Man as soon as I turned around that bastard got me by pulling a mayweather on me.

pulling a mayweather by Wolfie_48 October 6, 2011

Mayweather 

To give someone a hug. continually During a short period of time.

Girl: my boyfriend is so clingy, he keeps on mayweathering me.

Mayweather by Roberich May 3, 2015

mayweathered 

cheap shot, sucker punch, having no class, dirty, an unnecessarily aggressive and unfair attack directed at a defenseless person

dang homie, you just got "mayweathered"

mayweathered by lile broadway September 19, 2011

mayweathering

chickening out, being a pussy, making up excuses to avoid having to do shit that will prove one's worthlessness

me: The Floyd vs. Manny fight is off!
you: WTF!
me: Perfect example of Floyd's mayweathering!

mayweathering by chupack January 8, 2010