(Also known as Boston Cream Cake and Banana Cream Pie) Boston Cream Pie is a phrase meant for declaring that you have been interrupted while telling a story. The relation between the food and the situation (although weak) is that someone was being interrupted by someone who wanted to talk about pie all the time.
"So anyways, I was went up to her and I-"
"Dude, hold on I need to take this call."

"And then I went back to my room so I could-"
"Would you like a refill of your Sprite sir?"

"Hey, wanna hear something funny?"
"I'm hungry, I'm gonna go grab some food."
"......I guess not..."

These are the situations in which the person interrupted should say:
"Boston Cream Pie"
by Scot Taylor January 25, 2008
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When you bust a fat nut into an Irish girl from Boston who doesn’t pronounce her R’s.
“Hey Pahkah (Parker), I want you to paint my insides.”

Parker - “Someone’s ready for a Boston Cream Pie.”

I gave a Shannon the fattest Boston Cream Pie ever.
by The Real Sputnik May 26, 2022
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A Dessert and not what you are thinking of you incel
Jack: I had some Boston Cream Pie today.
Robert: Boston Cream Pie is not a food it's a-
Jack: Shut up Incel
by Oklahoma_Man April 26, 2022
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a three way homosexual act involving at least one filthy irish guy who takes the cum of the first gentleman(often black) up his ass to have the 2nd one(often italian) eat it out of the irish guy's asshole
a black guy, and a filthy Irishman walk into an Italian restaurant and yelled "which one of you guinea bastards wants a boston cream pie for desert?", as he bent the irish guy over the bar and fucked him in the ass.
by BrafZachland May 13, 2016
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When a man ejaculates in a woman who passed out sun tanning.
When we were in Mexico my girlfriend passed out on the beach and I totally gave her a Boston cream pie
by Herpesislove October 5, 2022
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When you ejaculate into someone's ass and then watch the cum, among other things, leak out.
Amy finally let me get some anal, so I gave her the ole' Boston Cream Pie.
by Metalbish February 7, 2022
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When Gronk is fucking Tom Brady’s ass but of course he’s wearing a condom because it’s safer that way. But then he’s super excited and he is about to come! He takes the condom off and spikes it super hard on the ground then comes inside Tom’s ass. Tom complains because it’s not part of his diet and the TB12 way. But those are the breaks with a Boston cream pie!
Gronk celebrated the super bowl victory by dropping a Boston cream pie inside the best QB of all time (GOAT).
by Tomgronk October 3, 2021
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