He's got a crush on her.

El tiene un coco con ella.

"He's got a coconut with her"

---

He's confused.

Tiene los cables cruza'os.

"He has his cables crossed"

---

You did a very good job!

¡Botaste la casa por la ventana!

"You threw the house out the window!"

---

He's acting like he has money.

Es un postalita.

"He's a postcard"

---

It's a big problem.

Eso ni lo brinca un chivo.

"Not even a goat can jump it"

---

He is showing off.

Se esta dando lija.

"He is sandpapering himself"

---

He died.

Cantó el manicero.

"He sang the peanut vendor"

---

She's cute

Que mona

"She's such a monkey"

---

He's a good guy.

Es un pan.

"He's a piece of bread"

---

He plays dumb.

Se hace la mosquita muerta.

"He plays the dead fly"

---

He's trouble.

Es la pata del diablo.

"He's the leg of the devil"

---

Come in, come in and have a seat.

Entre, entre y tome una silla.

"Between, between and drink a chair"

---

Just in case.

Por si las moscas.

"For if the flies"

---

I overdid it.

Se me fue la mano.

"My hand left me"

---

I'm going to slap you.

Te voy meter una galleta.

"I'm gonna stick a cracker in you"

---

He's spreading a rumor.

Esta corriendo la bola.

"He's running the ball"