A very poor and run down place or thing
Used often as an insult to peoples items.
Jo Jo: God Sasha you live in such a shitheap
Jo Jo: I need to save up some money and buy a new my car is a shitheap
A basic play with the word shithead, a shitheap is a complete arsehole, a person who lacks in social ability and basically is a shithead.
See also: shithead
You fucking shitheap!
A large pile of out of date or useless shit.
“You bought yourself an obsolete shitheap of a car”