To slapone's opponent such that an audible "poot" sound is emitted. This sound is formed by a puckering of the lips, a slight intonation from the vocal chords, and an exhaling of air. See McPeek.
See that foo! He got poot slapped! "POOT! McPeek!"
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi