Gas Tap 

Someone who lies or says something that really couldn't possibly happen.

Teacher: And that's why x=y
Boy: No it's Z you gas tap!

2

Boy 1: I heard Sally went out with Mike on Friday
Boy 2: No she didn't, you gas tap.

Gas Tap by Rummy11 October 1, 2010

pyongyang gas tap 

Typically consisting of wrapping a female's rectum around a gas tap and fucking her until she explodes, a speciality fetish.

Man, loved that woman but we did a Pyongyang gas tap and now it's all over

pyongyang gas tap by dylchiel December 4, 2017