“When the cave people went to the cave bar and asked for a drink on the rocks, they meant it”

“On the rocks” (on ice) is usually not taken literally—except in some jokes.
   
The American television sitcom New Girl, the episode “What About Fred” that originally aired on January 12, 2016, included this line:
   
“When the cave people went to the cave bar, and they asked for a drink on the rocks, they actually meant it.”
   
“How does a caveman like his drink ??? On the rocks” was posted on Twitter by EPig on April 24, 2016. “How do cavemen drink their scotch? On the rocks…” was posted on Reddit—Dadjokes on May 22, 2020.
 
   
IMDb
New Girl (2011–2018)
What About Fred
TV-14 | 23min | Comedy | Episode aired 12 January 2016
   
New Girl Transcripts
05x02 - What About Fred 05x02 - What About Fred 01/13/16 09:10
(...)
When the cave people went to the cave bar, and they asked for a drink on the rocks, they actually meant it. (laughs)
 
Twitter
JacKey ºoº
@theJackal24
When the cavemen went to the bar they actually had a drink on the rocks #NewGirl
8:05 PM · Jan 12, 2016·Twitter for iPhone
   
Twitter
Monica Sauseda
@mo2danicca
When the cavemen went and asked for a drink on the rocks they actually meant it
4:35 AM · Jan 13, 2016·Twitter for iPhone
 
Twitter
𝐉𝐨𝐧 𝐌𝐞𝐥𝐚𝐭𝐨𝐧𝐢𝐧
@Jon_Melin
“When a caveman ordered a drink on the rocks they actually meant it” I love New Girl so much
5:53 PM · Jan 17, 2016·Twitter for iPhone
   
Twitter
EPig
@EGM0590
How does a caveman like his drink ???
On the rocks
10:46 PM · Apr 24, 2016·Twitter for iPhone
   
Twitter
Katie
@ktfiesta
How did the caveman drink his drink? On the rocks
1:05 AM · Jan 9, 2017·Twitter for iPhone
   
Twitter
VanillaSpice
@_JakkyShakky_
When the cavemen asked for a drink on the rocks the really meant it
12:54 AM · Feb 26, 2018·Twitter for iPhone
   
Twitter
hina
@hinathinkss
When the cavemen asked for a drink on the rocks, they actually meant it
9:35 PM · Apr 14, 2020·Twitter for iPhone
 
Twitter
elijah
@eli_rutkowski
Caveman went to a cave bar and asked for a drink on the rocks, and got one
2:19 PM · May 17, 2020·Twitter for Android
 
Reddit—Dadjokes
Posted by u/DanGlerrBOY89 May 22, 2020
How do cavemen drink their scotch?
On the rocks…