get it - to understand something, to understand a joke Everybody was laughing at the joke but I did not get it. get it all together - to be in full control of oneself My friend got it all together and applied for the job at the supermarket. get it through one`s head - to understand/believe something The man has got it through his head that he will get a job without making any effort. Get lost! - Go away! The girl told her brother to get lost so she could finish doing her homework. get mad at (someone or something) - to become angry with someone or something.