Definitions Of gas

verb

a person or thing that is entertaining or amusing.

the party would be a gas

an airlike fluid substance which expands freely to fill any space available, irrespective of its quantity.

hot balls of gas that become stars

fill the tank of (an engine or motor vehicle) with gasoline.

after gassing up the car, he went into the restaurant

kill or harm by exposure to poisonous gas.

But it's only at the end of the film that we learn what appears to have really happened: it is he himself who killed his mother, gassing her whilst apparently suffering from a delusion that she is another person.

talk, especially excessively, idly, or boastfully.

I thought you'd never stop gassing