Flatulence
Man: The thief was spending less than my wife. Police: Then why are you reporting it now Man: I think now the thief's wife has started using it!
An instagator!
Because the rest of the letters are not-E.
XS (excess).
Argon
Not much, but in Flint they are both regular and unleaded
Because you know you made a real ef-**fart**
