shit on your own doorstep
A relationship of any form between you and a person you know is going to cause trouble. Especialy true if you know the releationship has little or no meaning/future but you want to string it out anyway even though its gonna cause shit ex-girlfriend/boyfriend, friend of a brother/sister, close workmate or enemy of best mate are usually the other person
you shit on your own doorstep big time there bob... its all turned to crap and you still have to work with her till the end of the summer
shitted on your own doorstep
its basically means..you got caught cheating and was foolish to do it so near your locality of where you live..
"i shitted on your own doorstep"-i was in my local bar and who walks in only my nextdoor neighbour nosiest and boring cow in town,who eyes nearly popped out ..caught red-handed smooching another