Masks

Used playfully to tease someone who is being overly flattering or ingratiating. The tone is almost always warm and teasing rather than insulting.

Said affectionately or in mild exasperation about someone who keeps doing a characteristic thing. The literal meaning is 'there is no cure/remedy', but the idiomatic use is about a person's incorrigible habits.

Context determines which meaning applies. 'Quédatelo' means 'keep it'. Separately, '¿te estás quedando conmigo?' means 'are you pulling my leg?', a very common conversational use.

Literally 'to make yourself handsome/pretty'. Used colloquially to tell someone to dress nicely for an occasion. Warm and familiar in tone.

A fixed phrase signalling a point of no return. Used both literally (a road, a decision) and figuratively in tense or dramatic situations.