to put on a brave face, to put up a good front; to put one's best foot forward, to show oneself in one's best light, to appear in a good light, to look good, to make a good impression
to piss off, to annoy, to irritate; to have a (fucking) nightmare of a time; to be excessively bored; to bust one's arse; to work extremely hard; to push oneself to the limit