What is T.i.s.?
1.
a style of kicking with T.I.S. being the acronym for 'This Is Sparta'.
Usually used for when you kick someone/something strongly and similarly to how King Leonidas kicked the Persian messenger in the movie '300'.
Dude 1: Man, Stacy's chihuahua is annoying.
Dude 2: Yeh, I'll give the rat a T.I.S. kick when she isn't looking.
See