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1.
What you call somebody who is involved in activities that they would prefer nobody to know about because they make sure that their activities go unnoticed. These people also do not like surprise visits in case they are involved in schnaily activities.
Doing anyting in particular in Amsterdam for the last few days V??? Schnaily girl!!!
by Kol March 24, 2004
 
2.
Sneaky, sly, secretive, a person who looks like butter wouldn't melt in his/her mouth, somebody who is constantly up to no good but never gets caught.
Where were you last night you schnaily fucker???
by Kol March 23, 2004