When a girl is grinding on you and has her arms locked around your neck at the same time, making it impossible to escape.
Nick: Wow, did you see Austin last night at the dance? That girl had him in a Dirty Padlock all night!
Evan: Yeah i did, he looked so helpless.
Evan: Yeah i did, he looked so helpless.
by GFAEV423 September 28, 2010
A dirty padlock is similar to a dirty protest but its traditionally used at festivals where festival goers will smear faeces on their own tent to stop their belongings being stolen.
by han.han.han April 14, 2022