1. When a tank does unusual things in any sort of video game or even real life, such as flying, uncontrollable laughter or shoots out random objects.

2. When other a noob or a skilled person gets in a tank and blows up other noobs or skilled people while laughing out loud or making funny insults to cover up his noobish tactics.
Rofltank is:

A tank zooms by in the sky...WTF!!?

A tank killing hundreds in a game while the driver is saying owned, noobcake, get some, etc.
by Forgewolf January 24, 2009
Get the Rofltank mug.