| In normal usage now adays with young people, it is merely meeting someone, and just having sex with them, you go to a bar and meet someone you have not seen for a few years so you "hook up" ( have sex) with them.
You boy friend says not to worry, they just "hooked up" meaning they just had sex, no commitment.
It has been used for a few other things, but this is the most commom usage for the people I know |