to put a lot of effort into something (one previously did not put a lot of effort into), to put one's back into something, to put one's mind to something
çekim: geçmiş lade
köken: From lägga (“put”) + manken (“the withers (back of a four-legged animal)”) + till (“to”), in reference to an ox beginning to push against a yoke with its withers.
Han kan vara lite lat, men när han lägger manken till får han mycket gjort