Sucker punch

[Rihanna]

What Floyd Mayweather did to Ortiz on September 17 2011..

[Rihanna]

A punch that takes your enemy by suprise, possibly knocking them out.
Comes from them being a sucker for not having their guard up

[Tanya Shivari]

When your being eaten out by a guy/girl and your [prolapse] shoots out when you cum and you hit them in the chin.

[Gregory]

A sneaky punch from behind used for [the element] of surprise to [incite] the [ire] of prospective opponent. Usually it is just to shock the opponent, and not to cause any real damage.

[Ernesto]

What a pussy does when he knows [hes] going [to lose] and thinks he can get an [advantage].

[Renato]

An [ambush] [fist] [attack] on someone

[Tanya Shivari]

The act of saying Hey [whats that] just there on your shirt? then as the person looks down, [punching] them [swiftly] in the face.

[Couch Potatoe]

A sexual act in [witch] a female is sucking a dick and [punching] [the balls] repeatedly at the same time

[Agnes]

Noun.
This word describes the action of one person striking another wherein the attacker takes the victim completely by surprise. The act is intentional and employed by the attacker to gain an advantage over a victim. Often times, the victim likely did not have his [guard up]; was trying to avoid an argument/fight; did not want to fight.
This attack is most frequntly used by cowards, snitches, African American thugs (verifiable on YouTube video play), ghetto hood rats, Florence Mayweather, [Tito Ortiz], and [Sharkeisha].

[Jason Yan]

Sucker punch in Boxing. Any punch that is completely unexpected. Usually directed toward an overconfident opponent to take them by surprise.