A fart that's abnormally dense and therefore lingers in the air with a strong smell.
Damn, did you eat a burrito today? I can still smell your thick fart.
by Faranna November 12, 2007
Loud but sweet, the act of breaking wind in a noisy manner while producing a not unpleasant aroma, the product of breaking wind in said manner, a style of breaking wind popularised by girls named Leah.
Leah has just done a thick fart - I believe she is credited with their invention.
by Vishnu Nasrudin November 30, 2003