go-by
Slip by unnoticed
A go-by is a deliberate snub or act of passing someone over.
To give someone the go-by is to ignore or avoid them, especially after a previous relationship: She gave her old boyfriend the go-by when she saw him at the party.
The expression is somewhat old-fashioned but still understood.
snub
Deliberate dismissive rejection
disregard · pass over · brush off · cold shoulder · rebuff · dismiss · cut · shun · spurn · blow off
guideline
Recommended standard for action
yardstick · basis · measure · rule · precedent · model · example · indicator · gauge · touchstone
go-bystandstill
Total cessation of movement
halt · stop · staying put · standing still · stasis
go-byacknowledgment
Confirmation of receipt
recognition · engagement · attention · greeting · notice