She 'stamped' the cigarette 'out'. [=she put out the cigarette by stepping on it]
The fans cheered and 'stamped' [='stomped'] their feet as the team took the lead.
He 'stamped' the date on the letter. = He 'stamped' the letter with the date.
(..) just admit it. Yeah, good luck with that one. Whose side are you on? The losing side. - Thank you. - Uh, could someone stamp my You of all people, know that we discontinued that promotion. - Ta, ta all. - Same time next week? What did he just say? (..)2010 Megamind