eufuckingreka
Emphasized word for "eureka", especially used when one has been trying to figure something out for days.
Guy: "Eufuckingreka! I finally found out what the damn problem was!"
Dude: "And how long did you have to rant about it?"
Guy: "...Eight days..."
Dude: "And how long did you have to rant about it?"
Guy: "...Eight days..."