"Sticks it to" is an idiom that means to take advantage of somebody or make them suffer. There are several antonyms for this phrase, depending on the context. One of the most common antonyms is "helps out," which means to assist or support someone in need. Other antonyms include "shows kindness," "extends mercy," "gives generously," and "shows compassion." All of these antonyms describe actions that are the exact opposite of sticking it to someone. Instead, they depict actions that are supportive, compassionate, and kindhearted, showing that there are many ways to respond to situations and people that do not involve hurting others.