Ted Pettit, The World's Laziest Excel Power User. Views. x>=y means x is greater than or equal to y. You have to write it that way, x=>y is not allowed. Likewise, x<=y means x is lesser than or equal to y. And, you have to write it that way, x=<y is not allowed.
Freebase(0.00 / 0 votes)Rate this definition: Tic-tac. Tic-tac is a traditional method of signs used by bookmakers to communicate the odds of certain horses. Until the turn of the 21st Century it was a very common sight on racecourses in the UK, but with the advent of mobile technology it is now seldom seen.
Tics are rapid sudden movements of muscles in your body. Tics can be vocal, too. Both kinds of tics are very hard to control and can be heard or seen by others. However, some tics are invisible (e.g., toe crunching, building up tension in your muscles). Simple tics involve just one group of muscles and are usually short, sudden and brief movements such as twitching the eyes or mouth movements. Some simple tics can be head shaking, eye blinking or lip biting. Simple vocal tics can be throat clearing, coughing or sniffing.