Oh geez...yeah...I have heard a LOT of sayings over the years that just always sounded so stupid...and they STILL keep being said even after I point out their stupidity.
"Crazier than a bedbug"-while bedbugs are disgusting, nasty, filthy little things I don't think they are actually insane.
"What goes up must come down"-No shit sherlock...gravity works.
Often heard at funerals..."Well, at least he/she was ready to go and aren't suffering now." Ready to go WHERE? Of course they aren't suffering...the body is DEAD.
Oh...and one that just annoys me to no end..."FUCK ME A-RUNNIN'!" Oooookay...I just don't even know what to say to that one.
There are lots more...but I don't have time or patience to write them all.