Can be a sign
A notification such as on facebook
Or Noticing someone
P1: Woah Duddddde.. I love driving fast
P2: You should really pay attention to the speed limit
P1: Where is that?!
P2: Look at the notice mate
P1: Uggghh FFS.. Another Bloody Notification
P1: I don't care that someone else has taken the same quiz as me!!!
P1: Hey... I noticed you noticing me.. and I wanted you to notice that I noticed you noticing me.. and next time I notice you noticing me.. I want you to notice that I noticed you noticing me.. without me having to say so ;)
P2: F**CCKKK YOUU!