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Twillin means to spin or rotate something very fast.
Damon: Man did you see that guy?!?
Mark: Yeah he was really twillin his meat around in her face.
by Gen Snafu October 13, 2010
The act of not giving a f*ck.
Mark: Joe that project is due in 2 days!

Joe: Well we better start twillin.
by mad man! December 01, 2010
slang for "twin children"
"keith will be chillin' with the twillins this weekend.
by KeithD76 March 05, 2008
A combination of African American and Southern slang for "twin" and "children" See also Twidruns, Twilluns
"Keith will be hangin' with the Twillins this weekend."
by KeithD76 March 05, 2008