according to yesterday "มกปฟก" hashtag (which originally started from a fan & P'Shi QnA, i'll put in thread)

here another fan asked M what does it stand for (from his point of view)

M: มะกรูดเปรี้ยวฟินเกิ้น (ma-grood-priao-fin-goen) = sour kaffir lime is so yum ~
#EyezTT https://twitter.com/MSuppasit/status/1246370800828964864

มกปฟก = M G P F G
(so it can refer to any "set of words" that start with same alphabets)

and M's reply with มะกรูดเปรี้ยวฟินเกิ้น
(ma-grood-priao-fin-goen) > also "M G P F G"

pls find more about "มกปฟก" from this thread naka
v https://twitter.com/eyezonyou__/status/1245764283109011456?s=20