"shake my fist." an expression of anger, outrage, and/or frustration, whether it be comical or serious.
"that mfer cut me off in traffic! smf!"
or
"stay off my lawn you no good whippersnappers! smf!"
or
"i hate you. smf."
or
"stay off my lawn you no good whippersnappers! smf!"
or
"i hate you. smf."
by cuntsy March 12, 2010
Get the smfmug.