Undertard

A person who is both socially awkward and stupid (although not clinically so).
The person should be considered beyond what is now the socially unacceptable/ not politically-correct term, "retard."

Also, a leotard or unitard worn under clothes.

Bella was excited for us to meet her new friend, but after a moment of conversation, we found him to be an undertard.

by bamwhamthankyoumaam April 27, 2013

Undertardable

It's like understanding the situation while it can also tell someone knows that they are weird in many ways

Helen: Why don't you go to school yesterday?
Harry: I'm busy researching some good cultural documents
Helen: undertardable, have a nice day

by Kazuno April 6, 2022