“How do you get a pound of meat out of a fly?”/“Unzip it.”

An NSFW riddle is:
 
Q: How do you get a pound of meat out of a fly?
A: Unzip it.
 
A “fly” is small and has almost no meat, but the “fly” in the joke is a zipper. Sometimes “a pound and a half” or “five pounds” is given in the joke. 
 
“how do you get 1 1/2 pounds of meat out of a fly? you unzip it. Just the classy humor you expect from me” was posted on Twitter by Justin Milam on August 2, 2008. “How do you get a pound of meat out of a fly? Unzip it” was posted on Reddit—Jokes on August 12, 2018.
 
     
Twitter
Justin Milam
@justinmilam
how do you get 1 1/2 pounds of meat out of a fly?
you unzip it. Just the classy humor you expect from me
6:36 PM · Aug 2, 2008·Twitter Web Client
     
Google Books
Cemetery Road:
A Play
By Esiaba Irobi
Enugu, Nigeria: ABIC Books
2009
Pg. 117:
Lawani: (zips and unzips his fly) How do you get a pound of meat out of a fly?
 
Twitter
Ron Lester
@RonLesterRadio
How do you get five pounds of meat out of a fly?  Unzip it!
9:03 AM · Sep 13, 2009·Twitter Web Client
   
Twitter
Elvis Dagana
@elpadriiino
Q: How do you get a pound of meat out of a fly?
A: Unzip it
6:41 AM · Nov 19, 2009·Twitter Web Client
   
Twitter
bryan stepanian
@bryanstepanian
Q: How do you get a pound of meat out of a fly?  A: Unzip it.
3:35 PM · Jan 28, 2010·erased858
         
Twitter
Daily Groaner
@DailyGroaner
Q: How do you get 5 pounds of meat out of a fly? A: Unzip it. #jokes #humor #funny
2:28 PM · Jul 14, 2010·Twitter Web Client
 
Twitter
JokeRatingMachine
@JokeRating
Q: How do you get 1 1/2 pounds of meat out of a fly?      A: You unzip it! http://ow.ly/1krJCL
6:28 PM · Jun 10, 2012·Hootsuite
   
Twitter
Bob Kostic
@causticbob
Q: How do you get a pound of meat out of a fly?
A: Unzip it.
5:28 PM · Jun 10, 2016·Twitter Web Client
 
Reddit—Jokes
Posted by u/Bearyleaf August 12, 2018
How do you get a pound of meat out of a fly?
Unzip it
 
Reddit—DirtyJokes
Posted by u/VERBERD January 18, 2021
How do you get a pound of meat out of a fly ?
Unzip it.