"Lays one" is a phrase that refers to the act of passing gas or farting. While it may seem crass, many people use alternative phrases to describe the same action in a less vulgar way. Some synonyms for "lays one" include "cuts the cheese," "breaks wind," "passes gas," "let one rip," "toots," "farts," "lets off gas," "expels air," and "blows a raspberry." Each of these phrases offers a euphemistic way to describe the act of passing gas, although some may be more commonly used in certain regions or social situations than others.