I'm not sure either, so we'll have to run 3 searches:
Google Image Search for "boshkie":
Did you mean Boskie?
A Boskie according to google is:
Next, Dictionary.com:
Did you mean bosh kie?
NOW FOR OUR LAST HOPE, Urbandictionary.com:
NONE :O
However since I feel it is my duty to educate you,
Cleveland Steamer
This is a method of breaking up with a significant other or a severe type of revenge. This is where, the couple have one last night of outstanding sex. As the significant other falls asleep the guilty party proceeds to very gently leave a massive pile of excrement (shit to you less educated soles) on the significant other's chest.
My girlfriend was the receipiant of a Cleveland Steamer. Score!