Whether you've seen or participated in one or not, whether you live in a country that allows them or not, everyone knows what it means for workers to strike. Wikipedia defines it thusly:

Strike action, often simply called a strike, is a work stoppage caused by the mass refusal by employees to perform work. A strike usually takes place in response to grievances that employees feel management are ignoring. Strikes first became important during the industrial revolution, when mass labour became important in factories and mines. In most countries, they were quickly made illegal, as factory owners had far more political power than workers. Most western countries partially legalized striking in the late 19th or early 20th centuries. Strikes are sometimes used to put pressure on governments to change policies. Occasionally, strikes destabilise the rule of a particular political party. The strike tactic has a very long history. Towards the end of the 20th dynasty, under Pharaoh Ramses III in ancient Egypt in the 12th century BCE, the workers of the royal necropolis organized the first known strike or workers' uprising in history.

Similarly, anyone who follows politics and history knows that another kind of strike is often used to "put pressure on governments to change policies"- the hunger strike. Like strike actions, it also has a long history: Again from Wikipedia:

A hunger strike is a method of non-violent resistance in which participants fast as an act of political protest, or to provoke feelings of guilt or to achieve a goal such as a policy change. Fasting was used as a method of protest and receiving justice in pre-Christian Ireland, where it was known as Troscad or Cealachan. It was detailed in the contemporary civic codes, and had specific rules by which it had to be used. The fast was often carried out on the doorstep of the home of the offender; scholars speculate this was due to the high importance the culture placed on hospitality. Allowing a person to die at your home, for a wrong you were accused of, was considered a great dishonor. The fast's uses were primarily to recover debts or get justice for a perceived wrong. There are legends of St. Patrick, the patron saint of Ireland, using the hunger strike as well.

While there is no reason why hunger strikes could not be used by workers, until today I never heard of it happening:

Brazil crippled by Airstrike

Airports are getting back to normal in Brazil after air traffic controllers suspended a strike in protest at their working conditions. Government negotiators and trade unions reached an agreement to end the strike, which briefly halted all flights out of all of the country's 49 airports.
Action had spread across Brazil after air traffic controllers began a hunger strike in the capital, Brasilia. Thousands of passengers were left stranded by the protest. The striking controllers had said they had lost all confidence in their commanders and the equipment at their disposal. Air traffic controllers in Brazil have staged similar protests since last September, when 154 people were killed in the country's worst air disaster.