A goodnight alpaca is a night ritual between men. It starts with all of the friends ejaculating into one friends mouth (including himself). Then they all sit in a circle as the friend with the sperm solution kisses his friend to the left giving some of the sperm solution to him. Then that friend kisses the next one and so on until everyone has some in their mouth. The final action is everyone performing a spit take on eachother before they go to sleep.
Mom: "Are you heading to bed soon?"

Me: "Yes, after I do a goodnight alpaca with the boys."
by BoinkTownUSA August 21, 2019
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