french expression .: cette fille !! c'est un veritable cul de sac !!
means that girl TRAP ME !! doesn't want to let me go anymore ! like a fuckin dead end in a road!!
A french slang which describes having a large posterior. In english it would be the same as the terms "J-Lo ass", "ghetto booty", or more commonly "fat ass"
"Regarder cette fille, elle a un cul-de-sac" (translates to 'Look at that girl, she has a fat ass')
"Je suis désolé pour vous dire que votre amie a un cul-de-sac (translates to 'I'm sorry to tell you that your girlfriend has a fat ass')