A derogatory and offensive term used to describe anyone not of the airborne brotherhood and thus having a crap (non-airborne) hat. However, merely being an attached arm in a Maroon Beret is NOT GOOD ENOUGH. If you've not done the course you are still a crap hat.
The only non-airborne (to a degree) people who are NOT crap hats are the Gurkhas, Commandos and THEM - and even then there are those within the regiment who pour scorn on those from non-airborne units, regardless that they've passed selection. The French Foreign Legion uses a term referring to anyone who doesnt wear the Kepi Blanc are Casquette Merde, in other words the French Army.