A funny video to learn some real English.

THAT’S GROSS=  /grəʊs/ If something is gross it is nauseating, disgusting, revolting, it makes your stomach feel bad because you hate it. If a person is gross, they are offensive, disgusting.

SO GROSS= Very, very gross.

‘CAUSE YOU’RE FIRED= Because you are dismissed from work. If you have a job and you are fired, you lose your job and are unemployed.