Political aide who covers up or spins a politician's gaffs.
Don't worry about Larry, his fart catchers will take care of everything.
A person who cannot get their tongue further up the bosses / superiors / other persons arsehole. A kiss-arse. An arse licker. A rimmer. Someone who unnecessarily worships someone so much they catch their precious farts lest they be released into thin air.
That Tony Blair is a real fart catcher to George W Bush!