1chat 
/ˈtʃæt/ verb
chats; chat·ted; chat·ting /ˈtʃæt/ verb [no obj] 1 : to talk with someone in a casual way
▪ We chatted about our plans for the summer. ▪ called him up to chat 2 : to talk over the Internet by sending messages back and forth in a chat room
▪ She stayed up all night chatting with her friends online.
▪ We chatted about our plans for the summer. ▪ called him up to chat
▪ She stayed up all night chatting with her friends online.
chat up [phrasal verb]
chat (someone) up or chat up (someone) informal : to talk informally with (someone, such as someone you are attracted to)
▪ He tried to chat up a girl at the dance.
▪ He tried to chat up a girl at the dance.
