The combination of the words "so" and "well".
Wow, you do that swell!
You learned the concept swell.
I can do this swell.
A super cool word that super cool people say, you're only allowed to say it once a day.
Person 1: Yoo I just won the lottery!
Person 2: swell!
A physically fit individual that everyone expects to act like a douchebag, but is a genuinely kind person.
My dad is really swell guy, but he could kick your ass and apologize afterwards.
If you’re a swell it means you follow a person/group around
“Haven’t you noticed Harry is a swell”
When you give such a good dicking thay swell up
Damn I gave Trudy the love swells last night, she can't walk straight today