In one scene in the movie Spy Kids: All the Time in the World (2011), a baby poops and one character (played by actor Jeremy Piven) says:
 
“That smells like lentils and desperation.”
 
The line has been frequently cited.
 
   
Wikipedia: Spy Kids: All the Time in the World
Spy Kids: All the Time in the World (often referred to as Spy Kids 4D, also known as Spy Kids 4: All the Time in the World and Spy Kids 4D: All the Time in the World) is a 2011 American 4D spy adventure comedy film written and directed by Robert Rodriguez. It is the fourth and final installment in the Spy Kids film series and the stand-alone sequel to 2003’s Game Over, while also serving as a soft reboot of the franchise. The film stars Jessica Alba, Joel McHale, Alexa Vega, Daryl Sabara, Rowan Blanchard, Mason Cook, Ricky Gervais, and Jeremy Piven in a dual role. It was released on August 19, 2011. Filming began on October 27, 2010. It is the only serial that uses “Aroma-scope” that allows people to smell odors and aromas from the film via scratch & sniff cards (reminiscent of the 1981 film Polyester) last used theatrically in the 2003 animated film Rugrats Go Wild.
 
Springfield! Springfield!
Spy Kids 4: All the Time in the World (2011) Movie Script
(...)
That smells like lentils and desperation.
     
Twitter 
Chris
@chrisbroncos76
@jeremypiven Smells like lentils and desperation LOLOLOL
10:20 PM - 19 Aug 2011
 
20 August 2011, Press of Atlantic City (Atlantic City, NJ), “‘Spy Kids’ fails with gimmicks and bad puns” by Roger Moore, pg. ?:
The scratch-and-sniff “Aroma-Scope” gimmick of “Spy Kids: All the Time in the World” don’t work. Maybe I just got a defective card, but the scents you’re supposed to smell when the number flashes on the screen and you scratch the corresponding number on your card all smell like burnt artificial blueberry syrup.
 
So take away one “D’’ from this “4D” movie, one gimmick from a gimmick-laden kiddie comedy from the Robert Rodriguez “Spy Kids” factory. Gadgets, cheese puffs and diapers fly off the screen in the cheesiest kid-friendly 3D tradition. But chances are, you won’t smell them. Maybe I caught a break, as Rodriguez, channeling his inner middle schooler, wants us to smell vomit, dog farts and diapers.
 
“That smells like lentils and desperation!”
     
Twitter
Amy Rogers
@AmyTRogers
“Smells like lentils and desperation,” or did I just imagine hearing that line? #spykids #aromavision
6:42 PM - 22 Aug 2011
 
Twitter
Sam Macpherson
@Sam_Macpherson
Joe just wandered into the kitchen and declares,” It smells like lentils and desperation in here.” I cannot stop laughing!!
4:22 AM - 7 Aug 2012
   
Twitter
Nate St. Pierre
@NateStPierre
“Oh my god - that smells like lentils and desperation!” Best line from the Spy Kids with Jessica Alba, when her baby pooped
5:14 PM - 12 Jan 2014
   
Twitter
Genevieve Rice
@genevieverice
Overheard at a restaurant: A small child said that his soup smells like “lentils and desperation.”
2:56 PM - 8 Nov 2014
 
YouTube
Lentils and Desperation
Alpagame 106
Published on Apr 4, 2015
(Film clip of Spy Kids: All the Time in the World.—ed.)
 
Twitter
casey
@stqrrycalum
Replying to @dobricc
my 2017 was FILLED with lentils and desperation
12:49 AM - 31 Dec 2017