I hate to agrafer (buttonhole) you with some problems which are not du sucre (duck soup), but here are some French slang phrases translated literally into English. Your problem is to deduce the English equivalent of the meaning conveyed to a Frenchman by the slang expression.
Ashley, Leonard R. N.
"French Slang in Literal Translation,"
Word Ways: Vol. 13
, Article 4.
Available at: http://digitalcommons.butler.edu/wordways/vol13/iss2/4