Gas Trap 

When you fart in a car and roll up and lock the windows so your companion is forced to smell it.

He had to be rushed to the hospital after suffering complications from a Gas Trap. Paramedics say the perpetrator ate Taco Bell.

Gas Trap by Oh my God, they Killed Kenny! October 13, 2016

Trapped Gas 

When you have gas that is inside your body but doesnt want to come out. Some what like being constipated but instead of stool its gas.

"I ate those boiled eggs earlier today and now i have trapped gas."

Trapped Gas by Monster504 December 23, 2011

Gastraphobic 

When someone is afraid to pass gas (fart)

My belly is very sore today, im feeling gastraphobic

Gastraphobic by GhostsMagic August 11, 2019