slipshod.....very close to slipshot ..slip+shot..(in cricket)....so now think of a batsman ...playing a SHOT TO THE SLIP in a VERY CARELESS MANNER...thereby being caught out by the fielder at the slip.
all know SLIPKNOT band... thw members of this band are very solvenly in appearance as they wear masks for all the performances
relate it to shoddy which means inferior. One who uses shoddy material is slipshod. One can also link it with slapdash, the meaning is similar
we'll keep SLIP in front of HOD..........careless
who always slips in doing things coz he is CARELESS