Paul Pierce's Friends Troll Ex-NBA Star With Booty Birthday Cake

Paul Pierce continues to be the butt of the joke after his viral raunchy twerking party last year -- his friends trolled him by getting a birthday cake with a picture from the infamous Instagram Live session ... and it's hilarious!!

Pierce, who celebrated his 45th birthday last Thursday, posted a picture of the cake on Twitter ... which poked fun at his NSFW gathering that led to his exit from ESPN.

On the cake is a pic of Paul -- who looks mesmerized -- pictured next to a scantily clad woman with the words, "Monica come through," and "Happy Birthday Habibi."

"My boys got me this cake fa my bday they play to much," Pierce said on Twitter ... seemingly accepting the friendly jab.

Remember ... the former Celtics superstar posted a video on Instagram showing him having a good time as scantily-clad women twerked on the floor behind him.

Pierce was fired from his ESPN job just days later.

Paul didn't seem too phased by his firing at the time ... posting a video of him smiling and laughing, saying, "Big Things coming soon stay tuned make sure u smile."

Shoutout to Paul for being a good sport about it all.