My niece asked about "tewkin'". (long 'u' sound, like Duke Nukem)
I informed her that that was a new one for me.
Mom, now intrigued, asked "Could the person you heard use it be referring to a bird called a toucan?"
"I don't think so"
"Well, what did they say?"
"Aww, I forgot my tewkin mittens!"
At which point, I informed my niece that she had likely encountered a Canadian who was underdressed for the weather and was lamenting that they had forgotten their toque and mittens, and we were all disappointed that she hadn't taught us all a new swear. Except mom.
Tying this back to TFA, I find it interesting that my niece seems to have (at the age of 8) intuited the relation of hard-sounding consonants to swearing. Tewkin' meets the criteria of having a 't' and a 'k' and seems pretty plausible.