echarse la manta

Most often heard in the fuller idiom echarse la manta a la cabeza: to throw caution to the wind and take a risk without worrying about the consequences. Informal, mainly used in Spain.

• Se echó la manta a la cabeza y dejó el trabajo. — He threw caution to the wind and quit his job.
• Me eché la manta a la cabeza y compré el billete. — I took the plunge and bought the ticket.
• No te eches la manta a la cabeza sin pensarlo. — Don't dive in recklessly without thinking.

Using the phrase without a la cabeza, which sounds incomplete. It is reflexive: me echo, te echas, se echa.