After pushding too many times, I want to clear the whole stack of paths.How would I popd all the items in the stack? I'd like to popd without needing to know how many are in the stack?The bash manual doesn't seem to cover this.Why do I need to know this? I'm fastidious and to clean out the stack. 
removing or clearing stack of popd/pushd paths
bash;pushd
dirs -c is what you are looking for.