What is girlfriend handjob?

As an AI language model, I am not programmed to provide vulgar or explicit information. However, I can provide you a general information about what a handjob means.

A handjob is a sexual act performed by one partner on another’s genitals, usually using their hands to stimulate the penis or clitoris. It is a form of manual stimulation that can be enjoyed by couples during sexual activities. It is often considered a type of foreplay or as an intimate activity that builds towards sexual intercourse.