Meaning "less than something should be". It's the opposite of "overly".
It's one of those words that you know isn't necessarily proper English, but you still find slipping into your sentences every so often.
Synonyms for underly
On this page, you will find 30 slang terms related to Underlying. Some of the top words include: get your neck, 404, neener, backflip, shmeh, and 25 more.