Common but fun expressions in Spanish?
A couple of days ago, a forero wrote that his New Year's Resolutions included studying some Spanish every day. This started me thinking about some sort of a forum project along the lines of learning expressions.
Since I've only been on Spanishdict for a few weeks, I may have missed a post along these lines, but I am wondering about starting a thread with common expressions in Spanish that sound unusual in English. I am thinking in terms of non-regional expressions that would likely be understood in most Spanish speaking countries.
For example, I love the expression "no tiene pelos en la lengua" or "habla sin pelos en la lengua" - he tells it like it is; he speaks bluntly.
Another favorite is "no puedo verlo ni en pintura!" - I can't stand the sight of him.
I am hoping that you will share one or two of your own. If they are fairly standard expressions, most of us will be able to use most of them, regardless of what our travel destination is.
En sus marcas...Listos..Ya!
9 Answers
nacar tarde - to be born yesterday
perder el juicio - to go crazy
Mi media naranja = My better half, my significant other, or sometimes, my soul mate. "Baby, you're my half orange.." 
I just learned "nacer de pie" which means "to be born under a lucky star" . Is this the kind of thing you mean?
Por si las moscas. = Just in case.
Hasta las quince = Into all hours of the night
Estás tapando el sol con el dedo! Your covering up the truth!
vale la pena = literally means it's worth the pain
no pain no gain
Story: I was on trip to Mexico and climbing a pyramid and my profe told me this.
I always thought this was funny, I guess because it rhymes "a la luz de la tea, no hay mujer fea", "by the light of the tourch there is no ugly woman".
tener mucha tela -- to be tricky
encontrar la horma de su zapato -- meet one´s match -- literally this means "find the pattern of your shoe"
