Is a fest of multiple penises in an anus. It could be multiple penises in a number of anuses (i.e in a gang bang, where every one is doing anal and there is say two people to each anus). Anal fest is an number of penises festering around an anal, like a fly.
Anal fest is similar to anal invader but is based on having more than one anal invader.
Man! there are so many people going in and out, fucking that arse, it's an analfest.
When you suddenly become aware that everyone you know is having anal sex, including you.
"So Mark and I were doing anal last night and––"
"Wait. You're into anal?"
"Yeah! I decided to give it another try!"
"Me too!"
"Me three!"
"Me four!"
"Whoa. It's in the analgeist."
During sexual intercourse, when a man's dick slams the woman's vagina, the follow thru slap of the nuts onto her asshole is better known as, analtestestically.
She moaned with pleasure and her body trembled as she reached her climax, at a loss for words as she realized she had never been laid analtestestically.