Well since my home language isin't English so i don't know the particular word the describe what i do, so this might sound complex. This thing gives sort of a funky sound ( to me atleast ). What i do is i pluck the string using my index and thumb. Well not exactly pluck, i get hold of the string with my index and thumb and i just pull off the fingers
I would call it "popping".
Yup thats popping, it's something used in funk quite a bit (mainly by bassists) but it is fun to do on guitar in any style. And your English is really quite good!