This is the 7438th most frequent Japanese word.
俗っぽい
Vulgar or common; lacking refinement.
Here, '俗っぽい' indicates a quality of being vulgar or superficial, referring to the storyline as not deeply sophisticated.
この映画は俗っぽい内容だが、面白かったです。
This movie had a superficial storyline, but it was interesting.
In this sentence, '俗っぽい' is used to describe the jokes as lacking sophistication yet still having a positive effect on the atmosphere.
彼のジョークはとても俗っぽいけど、場を和ませました。
His jokes were quite trivial, but they lightened the mood.
Here, '俗っぽい' characterizes the designs of the clothes as flashy or not refined.