it's used to describe a person's mentality or acting in a situation by not trying to think logically , also can be used to describe a careless thinking behaviour
The place was on fire while he was watching the tv, he is FE-EL MESA'A'AH
Guy 1: Alright Whomst'd've'ly'yaint'yes'nt'lo'mergol'bul'teem'se'mut'ert'swe'nt'as'dfre'bvm'kgty'weio'fe'dre'colvd'fendf'iti'desx'verf'bg'nous'ev'ga'nam'oce'tylenol'de'ser'sewt'aqu'e'hajre'mel'timu'len'ous stole my beer?