My all-time favourite is "Nice shoes, wanna ****?" (say it in Estonian for added alliterative appeal)
"Is that a gun in your pocket or are you just happy to see me?" is another nice one, but can land you in a bit of trouble if it turns out that it is
a gun and he is not
happy to see you.
And the classic "That (article of clothing) looks good on you, but it'd look even better on my bedroom floor!"
Eighth Clue: How do you like your steak? Rare or medium?