1. An ambiguous identifier used as a variable, akin to
mathematics, in which any word can be inserted provided it keeps grammatical commandment. Typically the user has a specific word in mind that was purposely omitted.
see thingy,
thing.
2. Used as a filler word akin to "like", "um", et cetera.
other spellings: herpnshmerp,
herp-n-shmerp.