Lassie's lipstick refers to the lipstick shaped penis of a male dog - named after the famous four legged friend from the hit TV series.
Craig: Has anyone seen my ex-wife?

Rod: Yes, she is in the powder room putting on Lassie's Lipstick

Craig: Im not quite sure what you mean Rod...?

Rod: She has carefully peeled back the dogs foreskin to reveal his lipstick shaped cock, and she is moving it provocatively around her mouth whilst masturbating. I thing once she has finished she will start dressing the dog for some action.

Craig: Fuckin whore! shes gonna get a divorce - I want the house and she can keep the dog!
by pantysniffer2012 January 9, 2012
Get the Lassie's Lipstick mug.