1 : chase, attack —usually used as a command especially to a dog sic ’em. 2 : to incite or urge to an attack, pursuit, or harassment : set sicced their lawyers on me.

Why do they say sic em?

The command given to a dog, “sic ’em,” derives from the word “seek.” The 1992 punk rock album titled “Sick ‘Em” has helped popularize the common misspelling of this phrase. Unless you want to tell how you incited your pit bull to vomit on someone’s shoes, don’t write “sick ’em” or “sick the dog.”

What is siccing a dog?

: to order (an animal, such as a dog) to attack (someone or something) He sicced his dog on me. —often used figuratively The company sicced their lawyers on me.