Abbreviation for 'You Sick Fuck'.
by Duane April 24, 2005
Get the ysfmug. short for "You're So Funny"
by MAN (My anonymous name) March 5, 2011
Get the YSFmug. YSFS means "You So Fuckin(g) Stupid"
Can be used as a way to get out of a conversation that you may not want any more part in, or can be used as a plain flat out roast, or someone who is generally just flat out dumb.
Can be used as a way to get out of a conversation that you may not want any more part in, or can be used as a plain flat out roast, or someone who is generally just flat out dumb.
by burhhhhhhhh August 13, 2020
Get the YSFSmug. 
