What does "gal" mean in Hajimete no Gal and/or Japanese culture? In the anime Hajimete no Gal (aka My First Girlfriend is a Gal), it's made abundantly clear in the first episode that "gal" is not just another feminine pronoun.  Based on the 2 "gals" in the show, and compared to the other girls in the show, it seems there's a marked difference in style, personality, and appearance to be labeled a "gal".

What is a "gal" in anime or Japanese culture?
"Gal" is the English transliteration for gyaru, which is a fashion trend in Japanese culture.  This fashion trend includes things like:


Tanning/darkening the skin
Wearing lots of shiny makeup (traditional Japanese culture is very modest with makeup)
Wearing lots of jewelry and has lots of accessories (fake nails, excessive nail/toe polish)


Effectively, the "gals" in My First Girlfriend is a Gal are following the gyaru fashion trend.