If a Thai girl tells you she thinks you are a butterfly don’t worry it’s nothing bad, she just thinks you are a playboy, have sex with a lot of other girls and are unable to have a serious relationship. “Butterfly” is one of these words Thai people gave a new meaning and just use them when talking to foreigners in English, similar to “boom boom” the common expression for “to fuck”. Thai people never use the Thai translation of these words when talking to eachother.
Butterfly in Thai = pĕe sêua (ผีเสื้อ)
So a Thai girl will never tell a Thai guy he is a pĕe sêua, a butterfly. Of course there is a Thai word for playboy and if you speak Thai with the girl she will use that one instead:
Playboy in Thai = kon jâo chóo (คนเจ้าชู้)
Kon is the Thai word for person and jâo chóo the adjective that describes the habit of guys having serveral girlfriends (what Thai people call Giks). Of course it’s not just guys that can be playboys, playgirls, butterflies or whatever you can say both, if she talks to you in English she will say butterfly (many Thai people don’t even know that word if their English is bad) and if she talks to you in Thai she would say “khun bpen kon jâo chóo” – “You are a playboy.”
If you see a Thai girl that has a butterfly tattoo you know straight away that she has lots of farang boyfriends. Most of these girls are hookers. Good Thai girls generally don’t have tattoos at all and if you see a butterfly tattoo on her sexy shoulder you know that she’s probably not the type of girl you want to have a relationship with. But of course that doesn’t mean that it’s not fun to hang out with her.