This is the 11908th most frequent German word.
tolle
"Great," "fantastic," or "amazing."
Here, 'tolle' is used as an adjective describing 'Idee', meaning 'great' or 'fantastic'.
Das ist eine tolle Idee.
That is a great idea.
In this sentence, 'tolle' is an adjective describing 'Jacke', emphasizing its attractiveness or style.
Sie trägt eine tolle Jacke.
She is wearing a great jacket.
'Tollen' is used as a masculine accusative adjective agreeing with 'Urlaub', meaning 'fantastic' in this context.