Lpzpzt

The onomatopoeia spelling for a raspberry (fart noise made with the tongue).
Refers to the initial sticking out of the tongue followed by interchanging p's and z's for the duration of the fake fart.
Can also substitute the p's with b's to get a more fat tongue deeper raspberry

"I can't, lpzpzt, understand, lpzpzt, your accent, lpzpzpzpzt"

I had the biggest fart earlier
Did it sound like lpzpzpzpzt?
Way louder it was more like LBZBZBZBZT