flaco
skinny ; scrawny ; puny ; gaunt.
The writer discusses the fashion industry's obsession with skinny models.
It is easy to see its two scrawny protagonists who ride around town on their bikes killing stray cats and dogs as victims of poverty and broken homes.
They are for the most part, a puny, degenerate race, whose bodies are too weak for their overworked minds.
A dog standing in the middle of the road raised his hackles and growled as the line of filthy, gaunt humans marched down the dusty street towards him.
ahorrar para cuando lleguen las vacas flacas
save for + a rainy day
put aside for + a rainy day
Americans have stopped saving for a rainy day, living paycheck to paycheck and depending on credit cards to get them through emergencies = Los americanos han dejado de ahorrar para cuando lleguen tiempos difíciles, viviendo al día y dependiendo de las tarjetas de crédito para ayudarles a superar las emergencias.
A fifth of Britons admit to having no savings whatsoever while only just over a third of adults had less than £500 put aside for a rainy day = Una quinta parte de los británicos dice que no tienen ningún tipo de ahorro mientras que un poco más de un tercio tiene menos de 500 libras ahorradas para cuando lleguen tiempos difíciles.
hacer un flaco favor
do + a disservice
do + more harm than good
I think that Mr. Scilken's point was that there's so much material on the traditional three-by-five card that it's less useful, that it's distracting, in fact, and does a disservice to the public library.
Antidepressant drugs do more harm than good, and even cause the deaths of elderly patients, say researchers.
punto flaco [Zona que está fuera del campo de visión de una persona como, por ejemplo, al mirar por los espejos retrovisores de un coche]
blind spot
weak link
Contemporary library and information science discourse is plagued with tunnel vision and blind spots that seriously affect the profession's efforts to plan the library's future = La biblioteca contemporánea y el discurso de las ciencias de la información están plagados de visiones subjetivas y de puntos débiles que seriamente afectan a los esfuerzos de la profesión para planificar el futuro de la biblioteca.
They are the weak link in the playoffs, but they are good enough to beat any of their competitors on any given Sunday.
punto flaco, el
chink in the armour, the
The cyber criminals are persistent - if they can't get through one opening, they will keep trying until they find the chink in the armour.
ser el punto más flaco de Alguien
be at + Posesivo + weakest
Also, this method demands some knowledge of mathematics and statistical concepts, and these are areas where librarians in general are at their weakest.