-To be most uncomfortable in a situation. Most of us have experienced awkwardness when having to talk in front of a large group of people with the usual "so yea" and "so like".
-Another form of awkwardness would be when talking in person and being really really unsure and unusual about your actions and words. Not knowing what do except acting "awkward" ( See Awkward ) Unintentionally.
Guy: -searches Urban dictionary for awkwardness, finds no definition, awkwardness-
Walks into class teacher tells him/her to sit next to ex, awkwardness
lawling at joke about person, person walks up and asks why everyone's laughing, awkwardness