I do not have any sympathy for your problems.

Anyone who misses three classes will fail, and if you don't like it, tough luck!

Usage notes: sometimes used to say you are sorry that someone is having problems:

If a beggar approached us, she would murmur “tough luck” and give him a few coins.

Related vocabulary: tough shit

• as soon as
• as soon as possible
• as soon as something
• ass over teacup
• ass over teakettle
• as straight as a die
• as strong as a bull
• as strong as an ox
• as such
• as sure as eggs
• as sure as eggs are eggs
• as sure as eggs is eggs
• a stab in the back
• a stag night
• a stag party
• a stalking horse
• a standard-bearer
• a steady hand on the tiller
• a step in the right direction
• as the crow flies
• as the spirit moves
• as the spirit moves you
• as they come
• as things stand
• a sticking point