Here are some examples:
* "Naghihimutok ang mga tao sa mataas na presyo ng mga bilihin." (The people are complaining about the high prices of goods.)
* "Naghihimutok siya dahil sa sobrang init ng panahon." (He's grumbling because of the extreme heat.)
It's important to note that "naghihimutok" can also have a negative connotation, suggesting that the person complaining is being overly critical or whiny.