The Fart Test 

The fart test is a test of the closeness of one's relationship to another. If one is comfortable farting in front of others it means that they are close to that person and they have a good relationship with one another.You can tell how close you are with another depending if you hold in a fart around them or if you let it out without giving a shit.

The Fart Test can distinguish the relationship between two people such as
gfs farting in front of the bfs
best friends farting in front of one another

The Fart Test by tootinme January 4, 2011

the fart & flour test

n. A simple test to rank the obesity of others.

(Upon observation of a really fat bastard)
"Geeez. You wouldn't want her to fart in your last pound of flour"

the fart & flour test by brad July 21, 2003