Top Definition
The act of screaming "Du ma!" like a fob, then pulling a soggy, wet, greasy, cold, stanky eggroll out of ones pocket and shoving it into anothers mouth while they are trying to talk. Then violently slap the victim till satisfied.
girl: do you have s-i-l-v-e-r-w-a-r-e?...
guy: DU MA!!!
*fob slap*
girl: ow wtf!...oh hell naw. i've just been fob slapped. fml.
by PhatassTactix October 07, 2010

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