pop
The word 'Pop' is used in German as it is in English, to refer to a genre of music that is popular and typically commercial. It can also refer to a soft drink, in which case it is often used in combination with another word such as 'Cola-Pop'.
I like listening to pop music.
In this sentence, 'Popmusik' refers to a genre of music which is popular. This would be directly translated to 'pop music' in English.
He eats popcorn while watching movies.
In this sentence, 'Popcorn' is a compound word, but 'Pop-' is not used as a suffix. It refers to a popular snack that is often eaten during movies.
I like to drink lemonade, but not the pop brand from our town.
In this sentence, 'Pop-Marke' refers to a particular brand or type of a product, in this case, lemonade. The 'Pop-' in 'Pop-Marke' is not a suffix, but a part of the brand name. It is translated into English as 'pop brand'.