A jocular definition of “crowbar” is:
       
Q: What is a crowbar?
A: A place where crows got to get a drink.
     
Forms of the joke/pun/riddle have been cited in print since at least 1890.
     
“True fact: Before the crowbar was invented, most crows drank at home” was posted on Reddit—Dadjokes on May 7, 2019.
   
Other “crowbar” jokes include “A crow walks into a bar, and he says ‘ouch’. It was a crow bar” and “A crow walks into a bar. It becomes a crowbar.”
     
         
Wikipedia: Crowbar (tool)
A crowbar, also called a wrecking bar, pry bar or prybar, pinch-bar, or occasionally a prise bar or prisebar, colloquially, in Britain and Australia sometimes called a jimmy (also called jimmy bar or jemmy), gooseneck, or pig foot, is a tool consisting of a metal bar with a single curved end and flattened points, often with a small fissure on one or both ends for removing nails. In Britain, Ireland, New Zealand, and Australia, due to the influence of American media “crowbar” may occasionally be used loosely for this tool, but it is still mainly used to mean a larger straighter tool, its original English meaning (see digging bar). The term jammy or jimmy most often refers to the tool when used for burglary.
(...)
Etymology
The accepted etymology identifies the first component of the word crowbar with the bird-name “crow”, perhaps due to the crowbar’s resemblance to the feet or beak of a crow. The first attestation of the word is dated back to circa 1400.
             
18 October 1890, Beverly (MA) Citizen, “Chips,” pg. 4, col. 1:
John—“Charlie, do you know where crows get their morning nip?’
Charlie—“Haven’t the slightest idea, John.”
John—Why, at the crowbar, don’t yer know.”
 
6 December 1924, The Afro American (Baltimore, MD), “Merry Dumbbell,” pg. 11, col. 3:
Martha Dumbell was so dumb, that she thought a crowbar was a place where crows go to get a drink.—R. Hughes.
   
17 July 1941, The Plumas Independent (Quincy, CA), “Poem Posers,” pg. 7, col. 5:
And here is another
Which may make you think,
Would you calla crowbar
A place where crows drink?
 
Google Books
1970, Boys’ Life, “Think and Grin,” pg. 246:
Daffynishion: Crowbar—Fountain where crows drink.—Joey Hille, Burien, Wash.
 
Google Books
A Riddle-iculous Rid-alphabet Book
By Ann Bishop and Jerry Warshaw
Chicago, IL: A. Whitman
1971
Pg. ?:
What’s a crowbar?
Where crows drink
 
9 December 1972, Indiana (PA) Gazette, “Mini Jokes,” The Mini Page, pg. 3, col. 1:
Q: What is a crowbar?
A: A fountain where drink.
Jacqueline Henry—Indiana
 
Google Books
The Little Book of Daffinitions
By Thetis Powers
New York, NY: Harvey House
1977
Pg. ?:
CROWBAR
A place where crows go to drink
 
Google Groups: rec.arts.comics.misc
FANFIC: LNH: JONG #3
.(JavaScript must be enabled to view this email address)
1/24/94
(...)
Did you find out the weapon used in the crime ... a crowbar?
(Editor’s Note:  Hmm I always wondered why they would name a tool after a place where crows drink.) 
     
Google Books
Jay Leno’s How to Be the Funniest Kid in the Whole Wide World (or Just in Your Class)
By Jay Leno
New York, NY: Aladdin Paperbacks
2007
Pg. 7:
What’s a crowbar?
It’s where crows drink.
 
Twitter
Antix‏
@iam_antix
@rachaelf91 <<< Who thinks a crowbar is where crows go for a drink?

12:14 PM - 24 Jan 2010
   
Twitter
173BNVDZ‏
@thisoddfellow
A: a crowbar ...Q: a place where crows gather to drink? Now that’s hilare
12:50 PM - 24 Mar 2010
 
Twitter
Lucky Score‏
@LuckyScoreNet
Q: What is a crowbar?
A: A place were crows go
to get a drink!
#Joke from #BirdJokes in #Jokes,  #Humor and #Satire
2:41 PM - 26 Sep 2017
     
Reddit—Dadjokes
Posted by u/rodunk May 7, 2019
True fact: Before the crowbar was invented….
....most crows drank at home.
   
Twitter
Dad Jokes
@Dadsaysjokes
True fact: before the crowbar was invented…
most crows drank at home.
4:19 PM · May 7, 2019·Twitter for iPhone
 
Reddit—Oneliners
Posted by u/jojobeans22 September 7, 2019
Fun fact: Before the crowbar was invented, most crows drank at home.
 
Reddit—Jokes
Posted by u/crazyfortaco December 24, 2020
Before crowbars were invented…...
...most crows drank at home by themselves.