Air (one's) belly slang
To bring food from the stomach out through the mouth
Smelling the stench of rotten meat, I aired my belly.
Yesterday I was so tired that I had to air my belly.
Someone has vomited.
1. To laugh with shyness and embarrassment
2. Used to say that someone vomits on the floor, whether it's carpeted or not
To spew or vomit
Used to say that someone vomits into the toilet, usually as the result of drinking too much alcohol
The verb"air" must be conjugated according to its tense.
This slang is probably formed based on the figurative use of the word "air".