Download an IRC program. I recommend XChat Aqua for mac.
1) Create a new network connection, and name it lurkmore.
2) Click Edit. The XChat window for that connection will open.
3) Edit the server for the network connection to read irc.lurkmore.com/6667, then click Close.
4) Connect to the network.
5) Join the channel. Type /join #glitch hailstoot