The second tier list (after the first tier list known as 'hello list'.) A mental list of people you know by sight or repeatedly pass in the course of you day yet do not know by name, but eye contact stimulates a need to acknowledge identification usually returned by identical nod. Repeated presence on list may promote to hello list or other lists. See also "fuck list", "ignore list" "shit list"). lack of reciprocity will relegate person to 'shit list' or 'bitch list'. A person may move between these lists depending on response or sexual contact.
I saw that chick with the lazy eye at starbucks again today. i don't know her name she's on my nod list.