Shoddy Rainbows would be an excellent band name.
That is SO 2004! 
From our good friends at Daily Kos…
As many of you know, Christian conservatives got together in Texas (Must it always be Texas? There’s plenty of assholes in Florida! But I digress…) to firm up behind an Anti-Mitt, and they chose Rick Santorum. Now, it appears that there are some rumors/charges of voter fraud! It appears that some God-fearing, knuckle walking Protestant Troglodytes are way upset that they are seen as endorsing a mackerel-snapping Catlicker!
Mother of Mercy, is this the end of Rick?
No. But soon. Soon.
I’m pretty sure I recognized most of the words in that post, but … “mackerel-snapping Catlicker”? Knuckle walking? Is this one of those fun anagram posts where there’s a pithy saying if we rearrange things in just the right order?
Not that I disagree with the bits I do understand.
Yeah, mackerel-snapping? Why mackerel?
Lutefisk-lapping has a much nicer ring.
He’s a *catlicker *because he’s Catholic, Santorum that is. Mackerel Snapper.
Oh, I feel old.
Heavens to Murgatroyd, this thread is the first result of Googling mackerel-snapping Catlicker.
I think I’ll go put on a Rush album now. Maybe live one, preferably from the early 80s.
Yes. Let us know if you get it, there’s a prize! Cake. Delicious, tasty cake…
I’m making a note here, huge success…
It’s my understanding that mackerel is (or perhaps was, at the time the idiom arose) a cheap fish for Catholics to eat on Fridays.
Cake you say? Honestly?
I’m familiar with the term from James Whitmore one-man show Give 'em Hell Harry. There is a scene when Truman berates his WWI company during a panicked retreat.
“Come back here you goddam mackerel snappers!!!”
Sounds like something else to me. Like …
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Say, check out that chick at the end of the bar. She’s hot.
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You mean the one with the mullet and the sleeveless plaid flannel shirt? Dude, I think she’s a mackerel-snapper.
Wouldn’t that be a mackerel-snacker?
If I had to guess I’d say Mr. Mackerel-Snapper was that muppet who chucked the fish around.
Having been one, I always thought it was “mackerel slapper.” I couldn’t even figure out how I was being insulted. 
That would be Lew Zealand, and his boomerang fish act.
Awesome, thanks!
I first learned of the term when reading “MAS*H,” in a scene where the author thought it would be helpful for us to know the religious backgrounds of the surgeons in the Swamp. Trapper John was described as “a former mackerel snapper who had turned in his knee pads.”