Laugh at is an idiomatic phrase that refers to the act of finding something humorous or ridiculous and expressing amusement with laughter. Some synonyms for "laugh at" include chuckle at, giggle at, snicker at, grin at, smirk at, and laugh derisively. These words describe the varying degrees of laughter one can express, from a small smile to a full belly laugh. In some cases, "laugh at" can also imply teasing or ridiculing someone, so alternative phrases such as "make fun of" or "mock" may be more appropriate. Regardless of the synonym used, the act of laughing at something or someone is a natural human response to humor and the absurd.