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1.
When one happens to be talking on the phone while another is present; often times they will say PWIMM, as in Put Words In My Mouth as not to disclose the topic or subject of their conversation.
(Amanda is in the room with Jaime, while Jaime and Kel chat on phone re: Amanda's love life)
Kel: So, what's up with Amanda and her love life?
Jaime: PWIIN
by Kel & Anna April 04, 2003