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1.
An erection, usually of a male Naval Surface Warfare Officer (hence a SWO), caused by surface warfare related discussion or action. Most common in highly "swotivated" officers (read assholes). The female version of this condition is frequently referred to as "swet."
All that talk on naval surface fire support is giving me a huge swoner.
by Daniel Milton Breeden December 27, 2005
 
2.
1) A boner for all things Star Wars.

2) A guild in the Star Wars: The Old Republic massively multiplayer online role-playing game (MMORPG).
Nerd 1: "Man, dawg, did you see that new Star Wars game coming out soon?"

Nerd 2: "Yeah, bro, it totally gave me a swoner!"
by Renkaiden October 24, 2011
 
3.
Swoner (v) : When a person has so much swag that it gives a man a boner.
Holy shit, that skier has a shit load of swag" " I know man, it's giving me a swoner
by Zach, Connor May 16, 2011
 
4.
A swoner is a guy who "Swoops in with a Boner" a Swoner. This guy is the guy at work, in your group of friends or acquaintances (all LDS single wards have one) who is the first person to introduce himself to the new girl. This goes beyond being friendly. The swoner introduces himself, flirts, offers help to the new girl if she needs it, all with the hopes of getting his foot in the door before any other guy.
"Did you meet the new girl?"
"I was going to but Craig was talking to her already."
"Man, he's such a swoner."
by MSprak September 09, 2012
 
5.
A male erection caused by excitement related to working out or getting your pump on.

Swoll+boner=swoner.
Friend 1: "Dude, look at this tool decked out in Tapout."

Friend 2: "What a douche, he's probably got a swoner thinking about repetitively lifting heavy shit."

Ex.2 "Dude i have a throbbing swoner, it won't go away till I hit the gym.......... WTF!!!!! Did you use the rest of my muscle milk!?!"
by Taysched January 24, 2010