Swedaboo
Someone who is obsessed with Swedish culture, likely to an unhealthy degree.

Similar to weeaboo, but for Swedish culture instead of Japanese culture.

Other spellings and variants include swediboo, sweaboo, and sweeaboo (all of which are also found here on Urban Dictionary).

Does not include people who are simply interested in Swedish culture, history, language, etc. in a healthy, non-obsessive, non-fetishistic way, just like how a regular person that is interested in Japanese culture, history, language etc. in a healthy, non-obsessive, non-fetishistic way doesn't qualify as a weeaboo.
I saw some guy act like he knew everything about Swedish culture just because he binged a bunch of PewDiePie videos and Vinesauce Joel streams. What a Swedaboo.