Here are some very common English idioms using the word “hit”.
“Hit me up” : This means, “please contact me”. For example,
Hit me up tomorrow after you go to the gym.
“Hit it off” : This means, “it was very good”, or “things went very well for our first meeting”. This meaning comes from hitting a golf ball straight and far off of its stand for the first time. We usually use this when we describe meeting someone for the first time. For example,
A: How was your meeting with the new guy at work?
B: We hit it off really well.
“Hit the books” : This means, “to study”. For example,
I need to hit the books before I take my test.
“Hit the sack/hay” : This means, ” to go to sleep”. For example,
I’m tired so I’m going to hit the hay early tonight.
