an expression of aggression, forth rightness, efficiency, and extreme attention to detail in getting something done. a popular phrase for sergeants that was coined by Marine Light Attack Helicopter Squadron 303 Airframes and later spread to Marine Light Attack Helicopter Squadron 267 Airframes division. Hammer Down serves as an adjective in the sense of describing the expiditious, dominant manner an activity is conducted or as a stand alone verb such as A) laying the fuck into somebody. B) getting shit the fuck done C) regulating on bitches like a mofo.
1. "if you need me i will be outside on the flightline putting the hammer down on shit"
2. if these Marines keep fucking up I am going to put the fucking hammer down.

3. "we have a lot of work to do if we are flying these heli choppers tonight, we really need to hammer down"
by h. d. hammerton February 5, 2011
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verb- usually aggressive masterbation when deprived.

Causes can range from long stetches (meaning--months without being fucked), being stood up by a known trap queen, pent up frustration, building stamina, bad day, and/or just being horny.
That ass though. Hammered down 3x since.

Friday night... I''m just going to stay home and hammer down.

What have you been up to? "not much, just hammering down".
by Fstyle9 April 6, 2017
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Is a fictional, scorched earth code-name where in the U.S. military decides to cut it's losses and destroys, through carpet bombing, the U.S.'s own territories and/or cities that are deemed lost to enemy forces. The term was first used in the movie Cloverfield, followed by the video-game Call of Duty: Modern Warfare 2.
In COD:MW2 the Hammer-Down Protocol is a scorched earth policy through indiscriminant, large scale carpet bombing of the city of D.C. do to the heavy number of Russians in the area.

It is very similar in application and purpose in Cloverfield. However, it is used for the reason of an all-or-nothing attempt to destroy the monster, as well as the small parasites that had no-doubt flooded Manhattan.
by Dead Hand August 21, 2013
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1)A term truck drivers use meaning accelerate to maximum speed, or terminal velocity, which ever is faster. 2)Common uses by passenger vehicle drivers are pedal to the metal and floor it
Truck Driver 1 " breaker-one-nine whats your twenty?"
Truck Driver 2 "heading North on 95 - driver!"
Truck Driver 1 "What you haulin' good buddy?"
Truck Driver 2 "I'm haulin' a hot load of (insert cargo), I've got a long way to go and a short time to get there - Over"
Truck Driver 1 "Well, I reckon you better put the hammer down"
Truck Driver 2 " ten-four good buddy.. the hammer is down!"
by Blue Squid June 20, 2008
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The term comes from back in the day when Truckers were Truckers and their rigs didn't have A.C., in an attempt to cool off, truckers would put a sludge hammer down on the gas peddle, open their doors and stand outside on the steps while cruising down Route 66 through the Cajon Pass in Calif. They would call out on their CB's "put the hammer down". You would see a line of semis with truckers driving from the step of their trucks.
by L8erdayz January 14, 2022
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… A town where people don’t hate you. A town incorporated by Pat and Ken . Also see Simple Man Productions … also see Tidwell Trio❤️
I’m happy as Hale cause I’m from Hammer Down Town
by McMurph101 September 6, 2021
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The nail that sticks out gets hammered down is a Japanese saying that means deviation from the norm or not conforming will be punished.
"Sarah dyed her hair another different colour so her mom shaved her head."

"The nail that sticks out gets hammered down."
by penisshakes March 30, 2021
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