v. When someone convinces someone else not to give you a gift, especially when you did, in fact, want a gift; similar to jock block
Your mom: Oh, he doesn't need a gift. Save your money, buy yourself something nice. He would want it.
Gifter: Ok, if you're sure...
You (quietly): Oh... I've been gift blocked...
‘Gift Blocking’
Just like, **** blocking
However, it is done with a gift
You told your friend you were going to give a gift of some kind to someone else and they beat you to it with the same gift with that mutual friend.
I thought there was honer among friends and love interests but that dude is GIFT BLOCKING me.