wtfrusmkn

wtfrusmkn is a abbreviated word for what the fuck are you smoking?
it is generally used if somone is shocked at somone else because of out bursts of randomness

brod:i was playin world of warcraft yesterday and this level 13 punk thought he could take me on cause im level 28 but then i used level up potion and defeated him
me:wtfrusmkn?!?!