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2.
to go work out or enlarge your muscles
oh where were you?

i was at the gym swelling :)
by elizabeth16 July 10, 2008
 
1.
Slang for lying; to decieve or beguile. A slang term derived from the DC/MD metro area. Typically used in its progressive present participle: swelling.

-Note it is not common to use in simple form present tense: Swell
"My homeboy has a 92 Geo Prism and said he drove a G35 Infinity...swelling (lying) like sh*t"
by Michanism October 07, 2009