* "It's raining food!" - While literally true in the movie, this phrase is used more figuratively to express excitement and surprise, similar to how we might say "It's raining cats and dogs" for heavy rain.
* "You're in over your head." - Flint's invention, the FLDSMDFR, becomes uncontrollable and he realizes he's in a difficult situation he can't handle.
* "Don't put all your eggs in one basket." - Although not explicitly stated, this idea of diversifying your efforts is implied when Flint's invention is initially focused solely on food.
The movie's humor leans more towards puns and visual gags rather than traditional idioms. However, the "raining food" example showcases how a phrase can become iconic and resonate with the audience beyond its literal meaning, similar to how idioms function in language.