라 박다

sink money in; ram headlong

Every line here is one word, 꼬라박다 — a crude, forceful verb built on 박다 "drive in, ram". Both of its uses are present: driving headlong into something (그대로 머리를 꼬라박으면서, ramming his head straight in) and pouring money in and losing it — blew everything he earned, no country has sunk in as much, "I'll sink billions into this". It is rough speech, and the surrounding lines here carry swearing and an explicit apology for the wording; do not use it politely.

Register: crude, rough spoken