Other forms: oafishly
If someone says you're oafish, they think you're mean, clumsy, and not very smart. Maybe it's the way you barreled into the classroom, knocking over a chair and not apologizing as you smacked people in the head with your backpack.
Oafish behavior could include breaking your grandparents' best china as you attempt a magic trick with the tablecloth; clumsily hurting someone's feelings; or shoving a child out of the way in your rush to be the first to collect piñata candy. This derogatory adjective dates from the early seventeenth century, from oaf, "a foolish child left by fairies," which may stem from the Norwegian alfr, "silly person."