You put your arm round someone, and do a huuuuuuuuge body shake, whilst shaking their shoulders like a maniac and then they laugh at you like a maniac.
Created by the glorious Siobhan Sanford to prevent girl-on-girl violations, but can also be used in boy/ girl situations.
" It is a snuggle with kisses, is it not?"
"No, you are a fool."
"He wuggled me so hard that I fell off the bed."