One of the problems with Hagar the Horrible, and there are many, is the willingness of Chris Browne to jettison the historical context to make bad jokes. I Got Mine is a 21st century catchphrase which seems jarringly out of place here. What's the point of a Viking strip if the joke would have worked just as poorly in Blondie or Rhymes with Orange or Barney Google and Snuffy Smith?
Runners-up: Argyle Sweater, Baldo, Blondie, Dennis the Menace, Garfield, Opus
The pidgin English bit for the crocs can get a bit tiresome sometimes, but I think it worked well for their bastardization of things Charlie Brown might say. Me Kick Football is a great line in this context.
Runners-up: Agnes, Candorville, Cul de Sac, Get Fuzzy, Watch Your Head