Is Pigging out a Word?

Pig out is a verb phrase that means to eat a large or excessive amount of food in a sitting or over a short period of time, as in I am really looking forward to pigging out on Thanksgiving. ... The phrase is especially associated with the consumption of junk food.

What do you mean by pigging out?

intransitive verb. : to eat greedily : gorge.

Is Pig out a slang?

Meaning – To eat too much or to eat a lot. To eat to excess. ...