oversplain

To provide more detail than there is any reason to give. To over explain.

"Do you know what time it is?"
"Sure. My watch is pretty accurate, and I check it against my phone daily. My phone is the most accurate time device I usually have, but if I built a sundial I could get the exact solar time ..."
"You're oversplaining this. I just need to know whether or not you know what time it is."

by SKZX March 1, 2017