Definition
to request something from someone
向某人要求
I need to borrow some money, so I'm planning to hit my friend up to see if I can request it.
我需要借一些钱，所以我打算向我的朋友开口，看看能不能借到。
If you have any questions, feel free to hit me up; I'm happy to help.
如果你有任何问题，随时找我；我很乐意帮忙。
She wanted to invite me to the party, so she decided to hit me up for my thoughts.
她想邀请我去参加派对，所以她决定问问我的想法。