어 치다

strike it; hitting compounds

치다 is striking, and the verb before -어 turns it into a specific kind of blow. 받아치다 is hitting it back, used of a quick verbal comeback — 잘 받아치는 애드리브. 맞서 치고 나오다 is coming out swinging against someone, and 업어치기 is a shoulder throw. 올려치다 in one line is jacking a price sky-high, which by extension also means overrating something. The bare command 쳐버려 is simply "hit it".