MISSING MONDAY: PHRASAL VERB WITH 'OUT'

Hello and happy Monday to you, DV readers! We are starting this week with a Missing Monday that is a phrasal verb.

Here is your sentence:

Sentence: I need new shoes. These old shoes are (   ) out.

Do you know the missing word? Here are some hints.

Hint 1: The verb is irregular.  

Hint 2: It has four letters. 

Hint 3: It means "damaged to the point of not being useable."

Leave us your guess on our Facebook or Twitter pages and we will post the correct answer later. 

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Good luck, and thank you for participating!