When a person that is supposed to know what he's doing spaces out and does the complete office. The term was originally coined to refer to former Red Sox baseball player: Manny Ramirez. It can also be used in different context to refer to any idiot.
Sam: Look at that fool that just got hit in the head with a baseball.
Jim: Manny being Manny

Other examples.
Britney being Britney (slut)
Paris being Paris (bigger slut)
Lindsy being Lindsay (idiot) (and slut)
Alex being Alex (eternal failure to win a world series)
by nx7oe3 April 18, 2009
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A sex move that is a parody to the part of the popular doawk series in which manny licks all the barbecue chips clean.
The man ejaculates into his partner and then they both wait patiently for the cum to dry. When the cum is fine and flaky, the man licks his partner clean of cum.
Bro, I gave her The Manny last night!
by Breadybready December 1, 2019
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Man Panties, like dude thongs or speedos. Underwear that looks like female panties but woren by guys
As my friend scatch his ass, he turned towards me to reveil he was wearing mannies just under his jeans.
by Leslie S January 16, 2009
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A joke done by TikTok user wahony, using Manny from Diary of a Wimpy Kid as a totem of the Black Lives Matter movement, which later became to be a movement by using graffiti and social media. The movement got even more crazier when wahony wanted to do a joke version of the American flag, and replace it with Manny’s head, and making the flag black and yellow for Gen Z people, because they got bored. “The Manny Will Not Be Televised” was first used in a TikTok video of people using chalk to draw Manny and one of the artists saying that phrase.
by GameMemeExplainer July 31, 2020
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1. nickname for Manuel
2. male nanny(live-in maid+babysitter)
Dude, looks liike your ex-wife found herself a new fuck buddy & he's moved in with her

Nah, that's Manny(1), her new manny(2) -- he's really good with the kids. . .
by cyberpope67,BC,Canada October 1, 2012
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Manny Heffley is a Columbian drug lord who has been on the run from the FBI since the 1990's. He has been illegally trading drugs across the US border since the 1980s and have earned at least up to $10 million us dollars. The FBI has been trying to track him down but to no avail.
It is unknown whether he is still alive
In other news the feared Columbian drug lord Manny Heffley's current status is unknown after being under hiding since the 2000's the FBI have still not tracked him down
by October 4, 2021
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Everybody's favorite Thick Skinned ace detective! Detective Pardo is on the search for the most cunning of all the criminals the Miami Mutilator using only his rugged good looks and his thick skin. He also kills a few degenerates along the way.
Manny Pardo was born with THICK SKIN!
Remember that time the ace detective killed Tony and his concerning thin skin?
by MosbeyBarney June 6, 2019
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