Tourette syndrome is characterized by involuntary tics. Tics are repetitive movements or vocalizations. These can include common, simple tics such as eye blinking, shrugging shoulders or jerking of the head. Throat clearing or grunting sounds may be vocalization tics. Tics can also include several movements. These would be considered complex tics and can be shrugging shoulders combined with eye blinking or shrugging shoulders combined with a grunt or sound. Some people words rather than sounds (although less than 10% of people with tourette syndrome repeat curse words).
For more information: ADHD and Tourettes Syndrome