When an industrial facility that consumes a copious volume of water suddenly stops drawing water from a water treatment plant via a pneumatic switch or quick-close valve. The instantaneous closing of the valve causes a backup of water pressure that breaks water treatment plant pumps and pipes.
The water treatment plant's pumps were destroyed when a chicken plant slammed their valve closed after a washdown of the facility causing a water hammer
by Un-Civil Engineer December 23, 2011
Get the water hammermug. Describing when someone is about to do something gnarly, a great feat. usually relating to skateboarding, or other extreme sports manuevers. see also hammers
by shawn March 9, 2004
Get the hammer glovesmug. 
When one is so hammered (drunk) on drinking large quantiies of Jack Daniels' Whiskey that they don't even know their own name.
Good thing Ray was brought back to the motel last night by his friends, because after drinking a pint of JD he was totally jack-hammered.
by busterboner February 8, 2010
Get the [Jack-hammered]mug. "Why aren't you walking straight today"
"It's because last night i tried to do the thor hammer and I injured myself"
"It's because last night i tried to do the thor hammer and I injured myself"
by stinkyboy123 September 26, 2019
Get the thor hammermug. Poker terminology.
When someone raises early (usually pre-flop if playing Holdem) just to push other players around, and you just can't take that smug grin on his face, you re-raise a ridiculous amount and "drop the hammer." This most often occurs during a Testosterone Fight, and the object is to make the other player put his testosterone hose away and fold. Since it is pre-flop, this has nothing to do with the cards you have, just plain good ol' fashioned balls.
When someone raises early (usually pre-flop if playing Holdem) just to push other players around, and you just can't take that smug grin on his face, you re-raise a ridiculous amount and "drop the hammer." This most often occurs during a Testosterone Fight, and the object is to make the other player put his testosterone hose away and fold. Since it is pre-flop, this has nothing to do with the cards you have, just plain good ol' fashioned balls.
Sam: I call.
Ryan: I call.
Mike: I call.
Kevin: I call.
Marco: I call.
Matt: I call.
Dana: I call.
Devin: I call.
Dave: Well... I'll just double the blinds so I have even stacks... mwaahaahahaa...
Devin: Fuck that! I'm DROPPING THE HAMMER! All in, bitch!
Sam: Coooold bloooooded.....
Ryan: I call.
Mike: I call.
Kevin: I call.
Marco: I call.
Matt: I call.
Dana: I call.
Devin: I call.
Dave: Well... I'll just double the blinds so I have even stacks... mwaahaahahaa...
Devin: Fuck that! I'm DROPPING THE HAMMER! All in, bitch!
Sam: Coooold bloooooded.....
by Devin "Freytag" McNasty March 11, 2005
Get the drop the hammermug. by pendletonbound August 8, 2003
Get the to throw the hammermug.