This is the 12439th most frequent Swedish word.
skoja
"Skoja" means "to joke" in English.
In this sentence, 'skoja' is used to mean 'to joke', referring to the action of engaging in playful or humorous interactions.
Jag älskar att skoja med mina vänner för att få dem att skratta.
I love joking with my friends to make them laugh.
Here, 'skoja' (or 'skämta' which is related) is implicated in expressing disbelief or surprise, similar to the phrase 'you must be joking' in English.
Du måste skämta! Är det verkligen sant?
You must be joking! Is that really true?
The word 'skoja' in this context implies making humorous remarks, often self-deprecatingly, to lighten a situation or divert attention.