ACK

ACK stands for “acknowledgment” and is commonly used in internet slang. It is primarily used to indicate someone’s understanding or reception of a message or information.

Examples:

1.

Person A: We should meet at the café at 2 pm tomorrow.

Person B: ACK! I’ll be there.

2.

Friend 1: Hey, I just found out that our favorite band is performing in town next week! Tickets are on sale now.

Friend 2: OMG, ACK! I’m already purchasing mine!