What is meant by being irresponsible ??
brief answer!!

If you're irresponsible, you're careless about the consequences of your actions. You can't really rely on irresponsible people. Being irresponsible is the opposite of being responsible and careful — you do what you like and don't care what happens afterward.

people like these are generally always in trouble and they need support for every thing

not responsible: such as. a : lacking a sense of responsibility. b : said or done with no sense of responsibility irresponsible accusations. c : unable especially mentally or financially to bear responsibility. d : not answerable to higher authority an irresponsible dictatorship.

Explanation:

Being irresponsible is the opposite of being responsible and careful — you do what you like and don't care what happens afterward. Forgetting to feed your dog for a week is irresponsible. Splashing around in a mud puddle in your new white pants is irresponsible. Drug use and unsafe sex are irresponsible. When the government runs up a huge deficit, many people think that's irresponsible. If you have to work with someone irresponsible, good luck: you're going to need it.

the flighty purpose never is o'ertook / unless the deed go with it"