Gary (as coined accidently by @harvs) is the bubhub term for a fart.
When have you embarrassed yourself by letting out a Gary?
I think my worst Gary experience was when I was a teenager staying at my friends house. We were on the couch and her mum was watching a beauty pageant on TV with us. There were quite a few laugh out loud moments, and I must have been really holding in a lot of wind at the time because I let out so many loud Garys when I laughed