"Makes mint" is an idiomatic expression that means to make a lot of money or profit. There are numerous synonyms that can be used to replace this phrase, the most common being "rakes in the cash", "earns a fortune", "hits the jackpot", "crushes it", and "cleans up". Other synonyms for "makes mint" include "makes a killing", "brings home the bacon", "lands a windfall", "strikes it rich" and "piles up the dough". No matter which synonym is used, all of them convey the idea of earning a large sum of money or having great financial success.