Your guide to proper Venmo etiquette in the year 2018

By now, we use Venmo so much that its name has secured a place in our cultural rolodex of new verbs. 
While we most commonly use Venmo to send cash for everything from last night's dinner to this month's rent, there's plenty of behavior on the app that's led me to raise an eyebrow from time to time. 
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Sure, sometimes I catch myself attempting to decipher the meaning behind the emojis sent from one acquaintance to another, but in t