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3.
rockin the rock bands of red wing is what afterthought does best
by hughbert himself April 10, 2003
 
1.
An afterthought is something thought of at the last minute. Afterthoughts are common among video games and movies.
Example:

"Did you hear about Halo: Reach?"

"Yeah, it seems like an afterthought"
by Frickin' I don't care June 13, 2009
 
2.
An insult used to describe someone of little or no importance; someone so lame and useless they're just considered a mere afterthought. Used by one of the characters in GTA V.
"You're a waste of space on this earth!"

"Fuckin' whatever..."

"Idiot! You depressing afterthought! Why oh why weren't you drowned at birth!?"
by lester square October 02, 2013