Definitions by Who said that

Brother G

Brother - friend
G - close friend
If your crush says this to you, you’re definitely friend zoned

Boy: Happy birthday! *gives present*
Girl: Ahh! Thank you so much brother G!
Boy: 😅

To give one's friend fapping material.

Subject: Hi friend. Do you have anything i can fap to?

Friend: Here is all the Fapmunition i have.