Tetrofill 

putting blocks together.

Man, Greg has such a high score in Tetris... he really knows how to tetrofill

Tetrofill by Fruiktheduke March 15, 2016

Tetrakill

When one decides to go against all reason and against all odds to completely and utterly annihilate a friendly fleet.

Jumping into 100 enemy ships is a example of a "tetrakill"

Tetrakill by The Island Man January 10, 2013