The common expression buscarle tres pies al gato applies to a person who is irritating someone, who may be losing his or her patience, by being very argumentative, and trying to prove something that cannot be proved with arguments that serve no purpose. People who love arguing or who have an impulse to always being right, have a tendency to split hairs. This expression is applied to those who try to prove the impossible with sophisms and fallacious arguments. Buscarle tres pies al gato is to complicate matters, to make Ilife difficult and also to ask for trouble looking for far-fetched approac

To split hairs
Buscarle (los) tres pies al gato

To not say a word
Sin decir ni pío

To bite your tongue
Morderse la lengua

To get down to business
Manos a la obra

Six in one, half a dozen in the other
De lunes a martes

You scratch my back and I'll scratch yours
¡Hoy por ti, mañana por mí!

If you want to make peace, prepare for war
Si las barbas de tu vecino ves cortar, pon las tuyas a remojar

To speak ill of someone/To get jealous
¡Poner verde!

To fight like cats and dogs
Llevarse como el perro y el gato

To backfire
Salir el tiro por la culata - Salir rana

Don't pee on my leg and tell me it's raining
A otro perro con ese hueso

To fit like a glove
Venir como anillo al dedo

What's done is done
A lo hecho, pecho

Period, moving right along
Punto pelota, y a otra cosa, mariposa

To have a blowout
Ponerse las botas

To bite the bullet
Hacer de tripas corazón

To make someone jealous
Poner los dientes largos

To let bygones be gybones
Hacer borrón y cuenta nueva

To have connections
Ser o estar enchufado