To look over and read a person's text messages while they are unaware of you seeing them. Considered very annoying to most people and an invasion to their privacy. Similar to eavesdropping.
Dude, you are matsching on me right now and I dont appreciate it. Knock it the fuck off.
A hardo is a person who tries extremely hard at everything. Most times a hardo will try very hard at things that do not require excessive effort. For example, sports practices, gym class, etc.
Wow did you see Jack at practice today? What a hardo!