When a woman unexpectedly inserts a finger two knuckles deep into a man's ass during foreplay.
Lisa wanted to surprise John so she gave him an aciding while she blew him.
by XYK October 04, 2012
aciding is when you trip out and you like see shit all crazy like =D
Look at the flooooooor!!!!!! It's all aciding and whatnot
by Gabe and Natalie =D December 04, 2006