What does "TICK" mean?

Słowo TICK ma wiele znaczeń.  W słowniku znajdziemy między innymi : TICK -a regular short, sharp sound make by a clock; a check mark; make regular short sounds..
Czyli: tyknięcie, tykanie, wsypa poduszki, kredyt, chwilka, znak na liście, tykać, cykać, odfajkowac coś na liście. A teraz najważniejsze znaczenie TICK to także KLESZCZ czyli coś, co mnie wczoraj użarło... I HATE TICKS!

Ticks are small, blood-sucking bugs. They can range in size from as small as a pin’s head to as large as a pencil eraser. Ticks have eight legs. They are arachnids, which means they are related to spiders. The different kinds of ticks can range in color from shades of brown to reddish brown and black. 
Read more:http://www.healthline.com/health/tick-bites#Ticks2