ok：

Used to show that you agree with something or give permission for someone to do something

give me five：

Informal to hit the inside of someone's hand with your hand to show that you are very pleased about something

handshaking：

The act of taking someone's right hand and shaking it, people shake hands when they meet or leave each other or when they have made an agreement

wave hand：

Say goodbye to someone by waving to them; raise your arm and move your hand from side to side in order to make someone notice you

hug：

To put your arms around someone and hold them tightly to show love and friendship

call：

(You) give promise to someone that you’ll make phone call to them

(Me) Ask someone to make phone call to you