There were definitely several very funny moments in this little book. But as others have said, the fact that it is nearly all dialogue, and often feels like a script hastily turned into a novel, made it harder to really get into the story or the characters. There's very little depth to anybody, and almost no physical description of anyone or anything.
What we do see of the characters isn't flattering. Sharon, the oldest of Jimmy Rabbitte Sr.'s six children, has just announced that she is pregnant, but she flatly refuses to identify the father. Her family's reactions, even if you suddenly somehow made them non-Catholic and non-Irish, seem awfully blase. They try and get her to tell who the father is, but after it's clear that she won't, they drop the matter. Sharon knows who the father is: George Burgess, the father of one of her girlfriends, who took advantage of her in the pub's parking lot when she was drunk.
She wonders just once, idly, if it could be classified as a rape. Well, yes, it probably could. But Sharon doesn't seem to care much one way or the other. The only emotion she seems to feel about the whole thing is embarrassment, and not the embarrassment of somebody who's been assaulted, or even the embarrassment of somebody who routinely gets falling-down drunk in public and blacks out. She's mostly embarrassed because George is a short, fat, goofy-looking guy, and when he figures out he's the father and begins tagging after Sharon like a puppy, thinking he's in love with her, she isn't afraid of him, only annoyed by his silly actions and contemptuous of his obvious besottedness.
Sharon and her family's idea of morality is such that when she concocts a lie about being pregnant by a Spanish sailor, who she picked up in a pub and claims not even to know his first name, they are relieved that it isn't pathetic Georgie Burgess. It's hinted that at least some don't believe her and suspect the truth, but they elect to pretend to buy the Spanish-sailor story in order to keep the peace.
Sharon is drunk or getting drunk throughout most of her pregnancy, which definitely doesn't look good for her baby. Especially since she is going to the doctor regularly and she and her father are reading books about pregnancy.
And then, when Sharon's baby is born, Sharon decides to name it ...
Georgina. And to call her George.
So all this effort to avoid acknowledging who the father is, and at the end it's like she's just thumbing her nose at the whole issue. So all that effort was for nothing? The whole plot of the story, just negated in one sentence?
The characters are foul-mouthed and earthy, and their love for each other is clear, but they all seem so dumb. Sharon, in particular. She doesn't even seem to mind that she is pregnant and poor and unmarried, living at home where six nearly-grown kids have to share two bedrooms. Her own, and most everybody else's, outlook, seems to be one of benign apathy.