Cobwebs

Colgar (literally 'to hang') is used colloquially for posting or uploading content to social media or the internet. A learner knowing only 'colgar' as 'to hang' would not guess this digital meaning.

Also appears as 'comer la cabeza a alguien', meaning to fill someone's head with ideas or persuade them obsessively. Both uses are very common in everyday speech.

Refers to secretly substituting one thing (or person) for another, often in the context of a trick or deception. Compositionally opaque: 'cambiazo' (augmentative of 'cambio') on its own does not signal deception.