…a pop
Definition 1 of 1
Pro Tip 1/3Casual Speech
Used mostly in informal conversations and friendly exchanges, not in formal writing. 
They charge 50 bucks a pop for concert tickets.
Pro Tip 2/3Pricing Clarity
Clarifies the price of individual items when buying more than one. 
If you buy three, it's $1.50 a pop.
Pro Tip 3/3Regional Use
Commonly used in North America and the UK, might be less understood elsewhere. 
Back in the States, you'd find sodas for a dollar a pop.