I'm all for originality in sinning, but for the most part no-one seems to have invented a new sin for centuries.
Then of course there's the rare ones like accidie (sloth, laziness, boredom, spiritual weariness), particularly experienced by monks.
So, I charge you to invent some unusual sins, with appropriate names - use of word verification terms is permitted.
Mine is hesive - this is a much-disputed sin, which sometimes meant removing your hair-shirt before the term of the penance was up; also the premeditation before committing a sin; also, in rare cases, sex with bees.