Mouse Five

Akin to that of a "Phone Five" whereby when talking on a mobile phone you yell "PHONE FIVE!" and each caller slaps their phone to simulate a 'High Five' without being near one another.

A mouse five takes place on computer instant messaging after something of great excitement or accomplishment have been achieved.

Both Parties raise their Mouse and slap it!

Adam: "I just got someone to babysit tonight, so we can play poker!"

Jon: "Mouse Five!"

*Slap Mouse*