Why do I need to know avoir la patate?
Because this is one of those colloquial expressions that brings a smile to people's faces and will make you sound very French if you use it.
So, what does it mean?
Avoir la patate - roughly pronounced 'ah vwar la pah-tat' - translates as 'to have a potato' (or more precisely, 'to have a sweet potato'), but it should not to be taken literally, unless you are standing in a kitchen.
In reality, this colloquial expression means to be in a great mood, with lots of energy or 'to be up for it'. It is akin to 'being full of beans'.
In French, patate can either refer to a sweet potato (patate douce) or it can be an informal way to refer to any kind of potato (pomme de terre).
You might hear people in France telling each other j'ai la patate if they're excited for something, or if they are too tired or do not want to attend an event, they might say je n'ai pas le patate.
As for its origins, some sources date this expression to the beginning of the 20th century.
Apparently, it has to do with the fact that the potato has a round shape, like a person's head. People began to use the word 'potato' to refer to healthy-looking people - or those with proportional, round heads. Then, over time it went on to mean someone is on good form.
Alternatively, there are a few similar expressions you could choose from, such as avoir la frite (to have a chip/fry) and avoir la pêche (to have a peach) which mean exactly the same thing.
You might also say avoir du tonus to mean someone has lots of energy.
Use it like this
Elle avait la patate jusqu'au coup de téléphone de sa banque - She was feeling great until the bank called.
Pauvre Jacques, il n'a pas la patate aujourd'hui. - Poor Jacques, he's not feeling too great, he's a bit down today.
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