look up any word, like dirty sanchez:
 
1.
similar to a wet willy (or willie), but when you lick your finger and put it in someone's asshole, making sure to turn it around for discomfort. extra points for anal discharge.
while evan was sleeping, i went behind him and gave him a wet walter
by evanslover November 14, 2007
 
2.
The act of dampening your finger and sticking it in an unexpecting victims butt crack, as you would a wet willy
Beth bent over in front of me and the opportunity presented itself so I gave her a Wet Walter
by TylerJ182 May 11, 2009
 
3.
Getting your finger wet and wiggling it in someones coin slot
"oh that girls crack is showing.. give her a wet walter"
by twaler May 11, 2009